.a1 
{ 
position:absolute; 
width:40px; 
height: 40px; 
top:10px; 
left: 100px; 
}
 
.a2 
{ 
position:absolute; 
width:40px; 
height:40px; 
top:10px; 
left:150px; 
}
 
.a3 
{ 
position:absolute; 
width:40px; 
height:40px; 
top:10px; 
left:200px; 
} 

.a4 
{ 
position:absolute; 
width:40px; 
height: 40px; 
top:10px; 
left: 250px; 
} 
.a5
{ 
position:absolute; 
width:40px; 
height: 40px; 
top:10px; 
left: 300px; 
} 
.a6
{ 
position:absolute; 
width:40px; 
height: 40px; 
top:10px; 
left: 350px; 
} 
.a7
{ 
position:absolute; 
width:40px; 
height: 40px; 
top:10px; 
left: 400px; 
} 
.a8
{ 
position:absolute; 
width:40px; 
height: 40px; 
top:60px; 
left: 100px; 
} 
.a9 
{ 
position:absolute; 
width:40px; 
height: 40px; 
top:60px; 
left: 150px; 
} 
.a10 
{ 
position:absolute; 
width:40px; 
height: 40px; 
top:60px; 
left:200px; 
} 
.a11
{ 
position:absolute; 
width:40px; 
height: 40px; 
top:60px; 
left:250px; 
} 
.a12
{ 
position:absolute; 
width:40px; 
height: 40px; 
top:60px; 
left:300px; 
} 
.a13 
{ 
position:absolute; 
width:40px; 
height: 40px; 
top:60px; 
left:350px; 
} 
.a14
{ 
position:absolute; 
width:40px; 
height: 40px; 
top:60px; 
left:400px; 
} 
.a15
{ 
position:absolute; 
width:40px; 
height: 40px; 
top:110px; 
left:100px; 
}