For vertical lines, I set X = Integer, and ranged Y for how long the vertical line should be.

For horizontal lines, I set Y = Integer, and ranged X for how long the horizontal line should be.

For diagonal lines, I used the equation y = mx + b.

For lines falling with a slope from right to left, I set X to be + X so that the slope is positive, and ranged X for how long the line should be.

For lines falling with a slope from left to right, I set X to be – X so that the slope is negative.