Changing Color

With computer graphics, when you set a pixel to a color, its previous color is completely gone. You can't mix colors by setting a pixel to several different colors. Here is a program that draws a red line from (1, 5) to (10, 5), then draws a yellow line from (5, 5) to (10, 5). The second line will over-paint half of the first line.

' 
' Two-tone Line
'
SCREEN 12
COLOR 4                 ' Pen color 4 (red)
LINE (1, 5) - (10, 5)   ' Horizontal red line in row 5
                        ' starts in column 1 goes to column 10
                        
COLOR 14                ' Pen color 14 (yellow)
LINE (5, 5) - (10, 5)   ' Horizontal yellow line in row 5
                        ' starts in column 5 goes to column 10
                        ' replaces part of previous line
END