GD, cut pieces from a image?

[me]

Hey all,

can someone reffere me to a example that cut's pieces from a existing Image
and save them somwere?

I have a image of 500 x 500 and i want to cut every 10 x 10 pixel of the
image :)

loop 50x
cut 10 x 10 piece
save it
loop 50y next y line
cut 10x 10 pixel

Thnks,

Me