p = peripheral.wrap("back")
local monitor = peripheral.wrap("top")

term.clear()
monitor.clear()
monitor.setTextScale(0.5)

term.setCursorPos(1,1)
monitor.setCursorPos(1,1)

write("Enter Setpoint: ")
monitor.write("Enter Setpoint: ")

input = tonumber(read())

term.setCursorPos(1,5)

term.write("Press 'X' to cancel")
monitor.write("Press 'X' to cancel")

if input < 5 or input > 0 then
  term.clear()
  monitor.clear()

  term.setCursorPos(1,1)
  monitor.setCursorPos(1,1)

  term.write("Setpoint:")
  monitor.write("Setpoint:")

  term.write(input)
  monitor.write(input)

  term.setCursorPos(1,2)
  monitor.setCursorPos(1,2)

  term.write("Pressure:")
  monitor.write("Pressure:")
else
  term.write("Setpoint must be between 0 and 5")
  monitor.write("Setpoint must be between 0 and 5")
  end

while true do
  x = p.getPressure()
  y = input
  y1 = input+0.45

  term.setCursorPos(1,3)
  monitor.setCursorPos(1,3)

  term.write(x)
  monitor.write(x)

  sleep(1)

  term.clearLine()
  monitor.clearLine()

  if x < y then
    rs.setOutput("right",true)
    rs.setOutput("back",false)

  elseif x > y1 or x>4.9 then
    rs.setOutput("back",true)
  elseif x > y or x>4.9 then
    rs.setOutput("right",false)
    end

    os.queueEvent("event_marker")
  local breakOut = false
  while true do
    event, key = os.pullEvent()
    if key == keys.x then --add any other events that should break the loop if necessary
      breakOut = true
    elseif key == "event_marker" then
      break
    end
  end
  if breakOut then break end
end
end