if mb = 1 and mx >= 50 and mx <= 100 and my >= 50 and my <= 100 then
currentTool := "pencil"
size1 := 1
size2 := 1
elsif currentTool = "pencil" and mb = 1 and pen = 0 and mx >= 330 and mx <= 880 and my >= 65 and my <= 460 then
drawdot (mx, my, col)
pen := 1
oldx := mx
oldy := my
elsif mb = 1 and pen = 1 and currentTool = "pencil" and mx >= 330 and mx <= 880 and my >= 65 and my <= 460 then
drawdot (mx, my, col)
drawline (mx, my, oldx, oldy, col)
oldx := mx
oldy := my
elsif mb = 0 and pen = 1 and currentTool = "pencil" and mx >= 330 and mx <= 880 and my >= 65 and my <= 460 then
pen := 0