Nice 
It looks great in colour too, change the last line to this:
 static int c=0;
 fb[120+int(65*4*y)][160+int(65*x)]=(c++)>>12;
Nice It looks great in colour too, change the last line to this:
 static int c=0;
 fb[120+int(65*4*y)][160+int(65*x)]=(c++)>>12;