--rainbow text in computercraft 1.7
screen = "" --the screen you want to print the reainbowtext on use peripheral.warp("side") to use a monitor
pos{} --the place where you start yo write
  pos[1] = ""
  pos[2] = ""
text = "" -- whatever you want to write

function ClearScreen(screen, pos[1], pos[2])
  screen.clear()
  screen.setCursorPos(pos[1], pos[2])
end

function rainbowText(text, screen, pos[1], pos[2])

  for i = 1, 8 do

    if i == 1 then
      color = "red"
    elseif i == 2 then
      color = "orange"
    elseif i == 3 then
      color = "yellow"
    elseif i == 4 then
      color = "green"
    elseif i == 5 then
      color = "blue"
    elseif i == 6 then
      color = "purple"
    elseif i == 7 then
      color = "magenta"
    end

    screen.setTextColor(colors[color])
    clearScreen(screen, pos[1], pos[2])
    screen.write(text)

  end

end

while true do
  rainbowText("hi",term,1,1)
end