this is a little bit stupid piano
Step1: with the fill tool choose any colour you want then fill all the paper with it
Step 2 : with the line tool make a black line in the middle of the paper
then fill the rest of the paper with a dark white colour.
step3: with the line tool make lots of lines for (DO , RE , MI , FA , SOL , LA , SI , DO ) and then back the black buttons .
step3: colour the upper buttons with black.
step4: make a little shadow on the left of the black and white buttons with the grey colour.
Step4: make some notes up on the light pink ( the colour you choosed ) part with the black colour (or any colour you want )
stepo5: Done =)