A Simple Grid

So we want to draw a simple grid ....
A grid consists of horizontal and vertical evenly-placed lines
We can use 2 loops:
- draw vertical lines, moving on the x axis, until we run out of room
- draw horizontal lines, moving on the y axis, until we run out of room
we can use variables to set how much we move the line each time so that the lines will move the same amount

So we want to draw a simple grid ....