FFFFFFFFFFFFFF....SSSSSSSSSSS
FFFFFFFFFFFFFF...SSSSSSSSSSS
FFFFFF................SSSSS
FFFFFF.................SSSSSS
FFFFFFFFFFFFFF.....SSSSSS
FFFFFFFFFFFFFF.........SSSSSS
FFFFFF............................SSSSSS
FFFFFF..............................SSSSS
FFFFFF.............................SSSSS
FFFFFF....................SSSSSSSSS
FFFFFF................SSSSSSSSSS
for ever !!!