plot Example
10 CLEAR SCREEN
20 PLOT 40,10,-1 ! lower pen before move
30 PENUP
40 PLOT 80,80 ! lower after move, default is 1
50 PLOT 80,90,0 ! raise after move
60 PLOT 90,80! pen is down
70 PLOT 100,60,-1 ! lower pen before move
80 PLOT 85,40! pen is down
90 PLOT 0,0,-2 ! raise before move
100 END
