1. You can paint with patches: use the moue to click on any of the colors at the top and then paint by coloring the patches below the mouse when the mouse button is pressed.
2. You can paint with a turtle (the turtle does the drawing) with pen-size equal to the width slider when the mouse button is pressed.
3. You can erase both patches and drawing simultaneously with the Eraser.
globals [mcolor]
to setup
ca
resize-world -70 70 -70 70
set-patch-size 3
set mcolor red
crt 1
ask turtles [
set color red
set size 3
]
palette
end
to palette
; this procedure draws the palette onto the patches where pycor > 60
end
to patch-paint
; this procedure paints by recoloring the patches when the mouse button is pressed
end
to turtle-paint
; this procedure paints by moving the turtle and using it to draw when the mouse button is pressed
end
to turtle-eraser
; this procedure erases both the drawn lines and the patches when the mouse button is pressed
end