monpaint

mon = peripheral.wrap("right")
local width, height = mon.getSize()
col = colors.orange

function setup()
  mon.clear()
  mon.setCursorPos(1,1)
  mon.setBackgroundColor(colors.black)
  mon.clear()
end

divheight = height/2
midheight = math.floor(divheight)


function clickScreen()
  while true do
    event, side, xPos, yPos = os.pullEvent("monitor_touch")
    mon.setCursorPos(xPos, yPos)
    if yPos == height then
      mon.setBackgroundColor(colors.black)
      mon.clear()
      clearBar()
    elseif xPos == width then
      colorChange()
    elseif xPos == width-1 then
      colorChange()
    else
      term.redirect(mon)
      paintutils.drawPixel(xPos, yPos, col)
      term.restore()
    end
  end
end

function clearBar()
  mon.setCursorPos(1,height)
  mon.setBackgroundColor(colors.red)
  mon.clearLine()
  mon.write("[Clear]")
  mon.setBackgroundColor(colors.black)
  colorBar()
end

function colorBar()
  term.redirect(mon)
  paintutils.drawPixel(width, 1, colors.white)
  paintutils.drawPixel(width, 2, colors.orange)
  paintutils.drawPixel(width, 3, colors.magenta)
  paintutils.drawPixel(width, 3, colors.lightBlue)
  paintutils.drawPixel(width, 4, colors.yellow)
  paintutils.drawPixel(width, 5, colors.lime)
     paintutils.drawPixel(width, 6, colors.pink)
     paintutils.drawPixel(width, 7, colors.gray)
     paintutils.drawPixel(width, 8, colors.lightGray)
     paintutils.drawPixel(width, 9, colors.cyan)
     paintutils.drawPixel(width, 10, colors.purple)
     paintutils.drawPixel(width, 11, colors.blue)
     paintutils.drawPixel(width, 12, colors.brown)
     paintutils.drawPixel(width, 13, colors.green)
     paintutils.drawPixel(width, 14, colors.red)
  mon.setBackgroundColor(colors.black)
  term.setCursorPos(width, 15)
  term.setTextColor(colors.white)
  term.write("X")
  term.restore()
end

function colorChange()
  if xPos == width and yPos == 1 then
   col = colors.white
  elseif xPos == width and yPos == 2 then
   col = colors.orange
  elseif xPos == width and yPos == 3 then
   col = colors.lightBlue
  elseif xPos == width and yPos == 4 then
   col = colors.yellow
  elseif xPos == width and yPos == 5 then
   col = colors.lime
  elseif xPos == width and yPos == 6 then
   col = colors.pink
  elseif xPos == width and yPos == 7 then
   col = colors.gray
  elseif xPos == width and yPos == 8 then
   col = colors.lightGray
  elseif xPos == width and yPos == 9 then
   col = colors.cyan
  elseif xPos == width and yPos == 10 then
   col = colors.purple
  elseif xPos == width and yPos == 11 then
   col = colors.blue
  elseif xPos == width and yPos == 12 then
   col = colors.brown
  elseif xPos == width and yPos == 13 then
   col = colors.green
  elseif xPos == width and yPos == 14 then
   col = colors.red
  elseif xPos == width and yPos == 15 then
   col = colors.black
  end
end

setup()
colorBar()
clearBar()
clickScreen()