MonLineDrawer.lua

local monitor = peripheral.wrap("left")
if not monitor then
printError("No monitor found. Please connect a monitor.")
end

function monitorTouchDraw(xPos, yPos, xPos2, yPos2)

while true do

event, side, xPos, yPos = os.pullEvent("monitor_touch")
event, side, xPos2, yPos2 = os.pullEvent("monitor_touch")

    break
end

term.redirect(monitor)
paintutils.drawLine(xPos, yPos, xPos2, yPos2, 0x1)

end
while true do
monitorTouchDraw()
term.native()
end