found a bug on draw command

[nitrofurano]

Code:

10 cls:out 254,6 12 let x1=60:let y1=60 14 let x2=70:let y2=50 16 plot x1,192-y1 18 draw x2-x1,y1-y2 22 let x1=80:let y1=60 24 let x2=90:let y2=70 26 plot x1,192-y1 28 draw x2-x1,y1-y2 30 pause 0

this code should draw two lines, not one line and one dot...