draw

m = peripheral.find("monitor")
draw = {}

function redraw(name)
  for x = draw[name]["x"],draw[name]["x"]+draw[name]["dx"]-1,1 do
    for y = draw[name]["y"],draw[name]["y"]+draw[name]["dy"]-1,1 do
      m.setCursorPos(x,y)
      m.setTextColor(draw[name]["col"])
      m.write("0")
    end
  end
  return nil
end

function edit(name, posx, posy, lenx, leny, color, text)
  draw[name] = {}
  draw[name]["x"] = posx
  draw[name]["y"] = posy
  draw[name]["dx"] = lenx
  draw[name]["dy"] = leny
  draw[name]["col"] = color
  draw[name]["txt"] = text
  redraw(name)
  return nil
end

function delete(name)
  draw[name] = nil
  redraw(name)
  return nil
end