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Perspective
box uniform. Then, choose another hue and fill the top of the right hand box.
Use the paint bucket to fill the top shapes with color from the HSB sliders.
Select the Eyedropper tool and sample the top of the left box you colored. Go back to the HSB color slider and change the saturation (S slider) to create a lighter color variation of the side. Fill the side with this color.
Adjust the HSB colors to make a highlight shade for the left side of the bottom diamonds.