.blue { background: transparent url(blue/middle2_blue.gif) no-repeat; }
.red { background: transparent url(red/middle2_red.gif) no-repeat; }
.yellow { background: transparent url(yellow/middle2_yellow.gif) no-repeat; }
.orange { background: transparent url(orange/middle2_orange.gif) no-repeat; }
.purple { background: transparent url(purple/middle2_purple.gif) no-repeat; }
.green { background: transparent url(green/middle2_green.gif) no-repeat; }