STEP 13: Since the diameter of the circle is changing, we must recalculate the area every time we move the mouse.

• In the LOGIC tab, click on and drag out Float Variable inside the move_mouse block.
• Change the name of the variable from my_var to circle_area.
• Change the value of circle_area from 2.34 to this equation: 3.14 * (x/2) ** 2

We are using (x/2) as our radius, since we set our diameter to be equal to x!

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