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if I went to draw a rectangle that is 50
pixels tall and that is twice as wide as

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it is tall

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how would I programmed the computer to
do that well I could tell the artist to

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go up 50 turn right and then go over 100
and move the whole thing twice but then

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i'm doing the math for the computer
multiplying 50 x 2 in your head may not

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be that hard but computers are really
good doing that so we should leave it to

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them whenever possible if I just use the
variable called height instead then I

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could easily change height 250 and then
change my algorithm to tell the artist

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to go up by height turn right and then
go over x height x 2 which gives us a

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rectangle that is twice as wide as it is
tall