STEP 8: Let's calculate the y-coordinate for our first square in the top lefthand corner.

• In , drag Subtraction indented inside create_maze().
• Change the variable to the left of the = sign from my_var to y.
• Change number 5 to 250 and the number 1 to square_length/2.
• We place squares using their center coordinates, so we're subtracting half the square's length from 250.

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