var check1 = 0;
    var check2 = 0;
    var check3 = 0;
    var check4 = 0;

    function start()
    {
      document.getElementById("subliminal").style.backgroundImage = "url(images/2029018022.jpg)";
      document.getElementById("subliminal").style.backgroundPosition = "center";
      document.getElementById("subliminal").style.backgroundRepeat = "no-repeat";
      document.getElementById("sculptures").style.backgroundImage = "url(images/390620546.jpg)";
      document.getElementById("sculptures").style.backgroundPosition = "center";
      document.getElementById("sculptures").style.backgroundRepeat = "no-repeat";
      document.getElementById("signs").style.backgroundImage = "url(images/1429996198.jpg)";
      document.getElementById("signs").style.backgroundPosition = "center";
      document.getElementById("signs").style.backgroundRepeat = "no-repeat";
      document.getElementById("resonanz").style.backgroundImage = "url(images/1169102016.jpg)";
      document.getElementById("resonanz").style.backgroundPosition = "center";
      document.getElementById("resonanz").style.backgroundRepeat = "no-repeat";
      changeSubliminal();
      changeSculptures();
      changeSigns();
      changeResonanz();
    }

    function changeSubliminal()
    {
        if(check1 == 0)
        {
            document.getElementById("subliminal").style.backgroundImage = "url(images/2029018022.jpg)";
            check1 = 1;
        }
        else if(check1 == 1)
        {
            document.getElementById("subliminal").style.backgroundImage = "url(images/624013963.jpg)";
            check1 = 2;
        }
        else if(check1 == 2)
        {
            document.getElementById("subliminal").style.backgroundImage = "url(images/2036374228.jpg)";
            check1 = 3;
        }
        else if(check1 == 3)
        {
            document.getElementById("subliminal").style.backgroundImage = "url(images/1649051394.jpg)";
            check1 = 4;
        }
        else if(check1 == 4)
        {
            document.getElementById("subliminal").style.backgroundImage = "url(images/441993022.jpg)";
            check1 = 5;
        }
        else if(check1 == 5)
        {
            document.getElementById("subliminal").style.backgroundImage = "url(images/1548586981.jpg)";
            check1 = 6;
        }
        else if(check1 == 6)
        {
            document.getElementById("subliminal").style.backgroundImage = "url(images/11343422.jpg)";
            check1 = 7;
        }
        else if(check1 == 7)
        {
            document.getElementById("subliminal").style.backgroundImage = "url(images/1863296953.jpg)";
            check1 = 8;
        }
        else if(check1 == 8)
        {
            document.getElementById("subliminal").style.backgroundImage = "url(images/1111739544.jpg)";
            check1 = 9;
        }
        else if(check1 == 9)
        {
            document.getElementById("subliminal").style.backgroundImage = "url(images/1794245946.jpg)";
            check1 = 10;
        }
        else if(check1 == 10)
        {
            document.getElementById("subliminal").style.backgroundImage = "url(images/1001956514.jpg)";
            check1 = 11;
        }
        else if(check1 == 11)
        {
            document.getElementById("subliminal").style.backgroundImage = "url(images/1697599103.jpg)";
            check1 = 12;
        }
        else if(check1 == 12)
        {
            document.getElementById("subliminal").style.backgroundImage = "url(images/131703768.jpg)";
            check1 = 13;
        }
        else if(check1 == 13)
        {
            document.getElementById("subliminal").style.backgroundImage = "url(images/37510853.jpg)";
            check1 = 14;
        }
        else if(check1 == 14)
        {
            document.getElementById("subliminal").style.backgroundImage = "url(images/1336184391.jpg)";
            check1 = 15;
        }
        else if(check1 == 15)
        {
            document.getElementById("subliminal").style.backgroundImage = "url(images/1417214699.jpg)";
            check1 = 16;
        }
        else if(check1 == 16)
        {
            document.getElementById("subliminal").style.backgroundImage = "url(images/1507192756.jpg)";
            check1 = 17;
        }
        else if(check1 == 17)
        {
            document.getElementById("subliminal").style.backgroundImage = "url(images/1254697654.jpg)";
            check1 = 18;
        }
        else if(check1 == 18)
        {
            document.getElementById("subliminal").style.backgroundImage = "url(images/524661527.jpg)";
            check1 = 0;
        }
      window.setTimeout("changeSubliminal()",3000);
    }

    function changeSculptures()
    {
        if(check2 == 0)
        {
            document.getElementById("sculptures").style.backgroundImage = "url(images/390620546.jpg)";
            check2 = 1;
        }
        else if(check2 == 1)
        {
            document.getElementById("sculptures").style.backgroundImage = "url(images/1192672630.jpg)";
            check2 = 2;
        }
        else if(check2 == 2)
        {
            document.getElementById("sculptures").style.backgroundImage = "url(images/1048669445.jpg)";
            check2 = 3;
        }
        else if(check2 == 3)
        {
            document.getElementById("sculptures").style.backgroundImage = "url(images/1230250739.jpg)";
            check2 = 4;
        }
        else if(check2 == 4)
        {
            document.getElementById("sculptures").style.backgroundImage = "url(images/895340804.jpg)";
            check2 = 5;
        }
        else if(check2 == 5)
        {
            document.getElementById("sculptures").style.backgroundImage = "url(images/1807023447.jpg)";
            check2 = 6;
        }
        else if(check2 == 6)
        {
            document.getElementById("sculptures").style.backgroundImage = "url(images/1075839847.jpg)";
            check2 = 7;
        }
        else if(check2 == 7)
        {
            document.getElementById("sculptures").style.backgroundImage = "url(images/614159565.jpg)";
            check2 = 8;
        }
        else if(check2 == 8)
        {
            document.getElementById("sculptures").style.backgroundImage = "url(images/1209491806.jpg)";
            check2 = 9;
        }
        else if(check2 == 9)
        {
            document.getElementById("sculptures").style.backgroundImage = "url(images/536861151.jpg)";
            check2 = 10;
        }
        else if(check2 == 10)
        {
            document.getElementById("sculptures").style.backgroundImage = "url(images/1422865213.jpg)";
            check2 = 11;
        }
        else if(check2 == 11)
        {
            document.getElementById("sculptures").style.backgroundImage = "url(images/1194635582.jpg)";
            check2 = 12;
        }
        else if(check2 == 12)
        {
            document.getElementById("sculptures").style.backgroundImage = "url(images/34861369.jpg)";
            check2 = 13;
        }
        else if(check2 == 13)
        {
            document.getElementById("sculptures").style.backgroundImage = "url(images/1785594325.jpg)";
            check2 = 14;
        }
        else if(check2 == 14)
        {
            document.getElementById("sculptures").style.backgroundImage = "url(images/566461180.jpg)";
            check2 = 15;
        }
        else if(check2 == 15)
        {
            document.getElementById("sculptures").style.backgroundImage = "url(images/1817654374.jpg)";
            check2 = 16;
        }
        else if(check2 == 16)
        {
            document.getElementById("sculptures").style.backgroundImage = "url(images/1003758653.jpg)";
            check2 = 17;
        }
        else if(check2 == 17)
        {
            document.getElementById("sculptures").style.backgroundImage = "url(images/1891533165.jpg)";
            check2 = 0;
        }
      window.setTimeout("changeSculptures()",4000);
    }
    
    function changeSigns()
    {
        if(check3 == 0)
        {
            document.getElementById("signs").style.backgroundImage = "url(images/1429996198.jpg)";
            check3 = 1;
        }
        else if(check3 == 1)
        {
            document.getElementById("signs").style.backgroundImage = "url(images/1802770052.jpg)";
            check3 = 2;
        }
        else if(check3 == 2)
        {
            document.getElementById("signs").style.backgroundImage = "url(images/728013917.jpg)";
            check3 = 3;
        }
        else if(check3 == 3)
        {
            document.getElementById("signs").style.backgroundImage = "url(images/364023513.jpg)";
            check3 = 4;
        }
        else if(check3 == 4)
        {
            document.getElementById("signs").style.backgroundImage = "url(images/1235948770.jpg)";
            check3 = 5;
        }
        else if(check3 == 5)
        {
            document.getElementById("signs").style.backgroundImage = "url(images/1788492410.jpg)";
            check3 = 6;
        }
        else if(check3 == 6)
        {
            document.getElementById("signs").style.backgroundImage = "url(images/950993664.jpg)";
            check3 = 7;
        }
        else if(check3 == 7)
        {
            document.getElementById("signs").style.backgroundImage = "url(images/1853590771.jpg)";
            check3 = 8;
        }
        else if(check3 == 8)
        {
            document.getElementById("signs").style.backgroundImage = "url(images/1758996424.jpg)";
            check3 = 9;
        }
        else if(check3 == 9)
        {
            document.getElementById("signs").style.backgroundImage = "url(images/866374466.jpg)";
            check3 = 10;
        }
        else if(check3 == 10)
        {
            document.getElementById("signs").style.backgroundImage = "url(images/1446029485.jpg)";
            check3 = 11;
        }
        else if(check3 == 11)
        {
            document.getElementById("signs").style.backgroundImage = "url(images/1435611613.jpg)";
            check3 = 12;
        }
        else if(check3 == 12)
        {
            document.getElementById("signs").style.backgroundImage = "url(images/1145813862.jpg)";
            check3 = 13;
        }
        else if(check3 == 13)
        {
            document.getElementById("signs").style.backgroundImage = "url(images/1164899840.jpg)";
            check3 = 14;
        }
        else if(check3 == 14)
        {
            document.getElementById("signs").style.backgroundImage = "url(images/310223266.jpg)";
            check3 = 15;
        }
        else if(check3 == 15)
        {
            document.getElementById("signs").style.backgroundImage = "url(images/1723200063.jpg)";
            check3 = 16;
        }
        else if(check3 == 16)
        {
            document.getElementById("signs").style.backgroundImage = "url(images/1468540100.jpg)";
            check3 = 17;
        }
        else if(check3 == 17)
        {
            document.getElementById("signs").style.backgroundImage = "url(images/1060467291.jpg)";
            check3 = 18;
        }
        else if(check3 == 18)
        {
            document.getElementById("signs").style.backgroundImage = "url(images/1167953782.jpg)";
            check3 = 19;
        }
        else if(check3 == 19)
        {
            document.getElementById("signs").style.backgroundImage = "url(images/806135136.jpg)";
            check3 = 0;
        }
      window.setTimeout("changeSigns()",5000);
    }
    
    function changeResonanz()
    {
        if(check4 == 0)
        {
            document.getElementById("resonanz").style.backgroundImage = "url(images/1169102016.jpg)";
            check4 = 1;
        }
        else if(check4 == 1)
        {
            document.getElementById("resonanz").style.backgroundImage = "url(images/2064409586.jpg)";
            check4 = 2;
        }
        else if(check4 == 2)
        {
            document.getElementById("resonanz").style.backgroundImage = "url(images/591243766.jpg)";
            check4 = 3;
        }
        else if(check4 == 3)
        {
            document.getElementById("resonanz").style.backgroundImage = "url(images/1774188308.jpg)";
            check4 = 4;
        }
        else if(check4 == 4)
        {
            document.getElementById("resonanz").style.backgroundImage = "url(images/1224206218.jpg)";
            check4 = 5;
        }
        else if(check4 == 5)
        {
            document.getElementById("resonanz").style.backgroundImage = "url(images/1664827540.jpg)";
            check4 = 6;
        }
        else if(check4 == 6)
        {
            document.getElementById("resonanz").style.backgroundImage = "url(images/554858632.jpg)";
            check4 = 7;
        }
        else if(check4 == 7)
        {
            document.getElementById("resonanz").style.backgroundImage = "url(images/1504774729.jpg)";
            check4 = 8;
        }
        else if(check4 == 8)
        {
            document.getElementById("resonanz").style.backgroundImage = "url(images/124940457.jpg)";
            check4 = 9;
        }
        else if(check4 == 9)
        {
            document.getElementById("resonanz").style.backgroundImage = "url(images/2098246311.jpg)";
            check4 = 10;
        }
        else if(check4 == 10)
        {
            document.getElementById("resonanz").style.backgroundImage = "url(images/560888618.jpg)";
            check4 = 11;
        }
        else if(check4 == 11)
        {
            document.getElementById("resonanz").style.backgroundImage = "url(images/1488763723.jpg)";
            check4 = 12;
        }
        else if(check4 == 12)
        {
            document.getElementById("resonanz").style.backgroundImage = "url(images/575537682.jpg)";
            check4 = 13;
        }
        else if(check4 == 13)
        {
            document.getElementById("resonanz").style.backgroundImage = "url(images/1300745964.jpg)";
            check4 = 14;
        }
        else if(check4 == 14)
        {
            document.getElementById("resonanz").style.backgroundImage = "url(images/596767415.jpg)";
            check4 = 15;
        }
        else if(check4 == 15)
        {
            document.getElementById("resonanz").style.backgroundImage = "url(images/993202352.jpg)";
            check4 = 16;
        }
        else if(check4 == 16)
        {
            document.getElementById("resonanz").style.backgroundImage = "url(images/250165890.jpg)";
            check4 = 0;
        }
      window.setTimeout("changeResonanz()",6000);
    }