Press Esc to move focus away from the code area (Tab inserts a tab
character).

Let's try the following:

Change the line that calculates x so the box is still 50px wide, but
the 50 is calculated using the numbers 43 and 7 and an arithmetic
operator.

Change the line that calculates y so the box is 75px high, but the 75
is calculated using the numbers 25 and 3 and an arithmetic operator.

Change the line that calculates x so the box is 250px wide, but the
250 is calculated using two numbers and the remainder (modulo)
operator.

Change the line that calculates y so the box is 150px high, but the
150 is calculated using three numbers and the subtraction and division
operators.

Change the line that calculates x so the box is 200px wide, but the
200 is calculated using the number 4 and an assignment operator.

Change the line that calculates y so the box is 200px high, but the
200 is calculated using the numbers 50 and 3, the multiplication
operator, and the addition assignment operator.