Question: How do I do a double loop?

Set up a double loop in maple with the parameter "a" runing from 0 to 2 in steps of 0.02 and b running from -1 to 1 in steps of 0.02. Within de double loop set, set X0=a+b*I and compute 10 Newtons iterates. If X10 is close to 0, say absolute value of X10<0.1 then the iterates converge to 0. Color the pixel at (a,b) black if the iterates converge to 0 and white if not.
"Note": The equation to be set is X^3-3*X^2+2*X
Please help me in here, is due to tomorrow, and I've been trying all this week but I don't have any clue.
Best Regards,
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