bundled output not workin

shell.run("clear")
print("BC*ALC now running")
sleep(0.5)
print("beggining INT cycle")
redstone.setBundledOutput(bottom, colours.pink)
textutils.slowPrint("INT door open")
sleep(2)
redstone.setBundledOutput(bottom, 0)
textutils.slowPrint("INT doors closed")
--airlock procedure for future

print("stage 1 complete, begging stage 2")
  rs.setBundledOutput(bottom, colours.red)
    textutils.slowPrint("EXT doors open")
    sleep(4)
    rs.setBundledOutput(bottom, 0)

computer craft returns the error " :6: expected string, number "
and if i am to skip this line of code out, it will do it on the next bundled output, i tested other computers and i use bundled output all over my world, but this one dose not want to work

You are using the variable bottom without defining it. Based on your script, it looks like you want to use "bottom" (notice the quotes)