Pfthb

The purpose: Write a function that draws horizontal and vertical lines over a picture.
The spacing between two lines should increase by 3 pixels each time.
For example, if the spacing starts at 5, the pattern of increasing spacing will be 5, 8, 11, 14,...

Notice that # is used to comment out code. I've commented out two lines in my code (the same line, a counter) that I thought I needed to have to get my desired result but they're not working as I intended.

Also, note that I'm supposed to use addLine() to add lines.

So without the two lines "spacing=spacing+3" my program gives me a result of a picture with horizontal and vertical lines on top of the picture with a constant spacing of 5 pixels between them.

Here is a picture of how the desired picture will look like if you use a blank white picture as your picture parameter.

//imgur.com/WwZnPh3

Any help in figuring out a way to increment the spacing between two lines vertically and horizontally by 3 pixels would be greatly appreciated.

My code:

def drawLines(picture):
 W = getWidth(picture)
 H = getHeight(picture)
 spacing=5

 for y in range(0, H) :
 for x in range(0, W, spacing) :
 addLine(picture, x, y, x, y)
 #spacing=spacing+3

 for y in range(0, H, spacing) :
 for x in range(0, W) :
 addLine(picture, x, y, x, y)
 #spacing=spacing+3 
 explore(picture)