pls help pls

term.clear()
term.setCursorPos(1, 1)
print("Press O to switch to Object Layer")
print("Press M to switch to Map Layer")
print("Press up and down to switch colors")
print("Press S to change brush to solid")
print("Press F to change bruch to foreground")
print("Left Click to place a block.")
print("When you place an object it'll open up a code")
print("editor.")
print("Right Click to edit an object")
print("Press A to save it.")
print("Press any key to continue")
os.pullEvent("key")
term.clear()
color = 1
Pixels = {}
rcolo = 1
solid = 0
foreg = 0
while true do
  ev, p1, p2, p3 = os.pullEvent()
  if ev == "key" then
    if p1 == keys.o then

    elseif p1 == keys.m then

    elseif p1 == keys.up then
      if rcolo == colors.black then
        rcolo = colors.white
      else
        rcolo = bit.blshift(rcolo, 1)
      end
    elseif p1 == keys.down then
      if rcolo == colors.white then
        rcolo = colors.black
      else
        rcolo = bit.brshift(rcolo, 1)
      end
    elseif p1 == keys.s then
      if solid == 1 then solid = 0;
      elseif solid == 0 then solid = 1; end
    elseif p1 == keys.f then
      if foreg == 1 then foreg = 0;
      elseif foreg == 0 then foreg = 1; end
    elseif p1 == keys.a then
      term.setCursorPos(1, 1)
      words = ""
      term.write("File Name")
      name = read()
      file = fs.open(name, "w")
      print(#Pixels)
      for i = 1, #Pixels do
        if Pixels[i].color == colors.white then
          words = "1 "
        elseif Pixels[i].color == colors.orange then
          words = "2 "
        elseif Pixels[i].color == colors.magenta then
          words = "3 "
        elseif Pixels[i].color == colors.lightBlue then
          words = "4 "
        elseif Pixels[i].color == colors.yellow then
          words = "5 "
        elseif Pixels[i].color == colors.lime then
          words = "6 "
        elseif Pixels[i].color == colors.pink then
          words = "7 "
        elseif Pixels[i].color == colors.gray then
          words = "8 "
        elseif Pixels[i].color == colors.lightGray then
          words = "9 "
        elseif Pixels[i].color == colors.cyan then
          words = "A "
        elseif Pixels[i].color == colors.purple then
          words = "B "
        elseif Pixels[i].color == colors.blue then
          words = "C "
        elseif Pixels[i].color == colors.brown then
          words = "D "
        elseif Pixels[i].color == colors.green then
          words = "E "
        elseif Pixels[i].color == colors.red then
          words = "F "
        elseif Pixels[i].color == colors.black then
          words = "G "
      end
      words = words..tostring(Pixels[i].x).." "
      words = words..tostring(Pixels[i].y).." "
      words = words..tostring(Pixels[i].solid).." "
      words = words..tostring(Pixels[i].foreg)
      print(words)
      file:writeLine(words)
      sleep(0.5)
      end
      file:close()
    end
  elseif ev == "mouse_click" then
   Pixels[#Pixels+1] = {}
   Pixels[#Pixels].x = p2
   Pixels[#Pixels].y = p3
   Pixels[#Pixels].color = rcolo
   Pixels[#Pixels].solid = solid
   Pixels[#Pixels].foreg = foreg
   paintutils.drawPixel(Pixels[#Pixels].x, Pixels[#Pixels].y, Pixels[#Pixels].color)
  end
end