1 00:00:03,700 --> 00:00:13,599 if I went to draw a rectangle that is 50 pixels tall and that is twice as wide as 2 00:00:13,599 --> 00:00:15,009 it is tall 3 00:00:15,009 --> 00:00:19,960 how would I programmed the computer to do that well I could tell the artist to 4 00:00:19,960 --> 00:00:25,990 go up 50 turn right and then go over 100 and move the whole thing twice but then 5 00:00:25,990 --> 00:00:31,150 i'm doing the math for the computer multiplying 50 x 2 in your head may not 6 00:00:31,150 --> 00:00:36,220 be that hard but computers are really good doing that so we should leave it to 7 00:00:36,220 --> 00:00:41,140 them whenever possible if I just use the variable called height instead then I 8 00:00:41,140 --> 00:00:46,540 could easily change height 250 and then change my algorithm to tell the artist 9 00:00:46,540 --> 00:00:52,989 to go up by height turn right and then go over x height x 2 which gives us a 10 00:00:52,989 --> 00:00:55,720 rectangle that is twice as wide as it is tall