ComputerCraft program for controlling power generation

os.loadAPI("button")
mon = peripheral.wrap("top")
mon.clear()

function createButtons()
  button.setTable("Fuel", fuel, 2,17,1,3)
  button.setTable("Charcoal", char, 2,17,5,7)
  button.setTable("Lava", lava, 2,17,9,11)
  button.setTable("Redstone", rstone, 2,17,13,15)
  button.setTable("Ender Pearl", ender, 2,17,17,19)
  button.screen()
end

function getClick()
  event,side,x,y = os.pullEvent("monitor_touch")
  button.checkxy(x,y)
end

function fuel()
  button.toggleButton("Fuel")
  if redstone.getOutput("left") then
    redstone.setOutput("left", false)
  else
    redstone.setOutput("left", true)
  end
end

function char()
  button.toggleButton("Charcoal")
  if redstone.getOutput("back") then
    redstone.setOutput("back", false)
  else
    redstone.setOutput("back", true)
  end
end

function lava()
  button.toggleButton("Lava")
  if redstone.getOutput("right") then
    redstone.setOutput("right", false)
  else
    redstone.setOutput("right", true)
  end
end

function rstone()
 button.toggleButton("Redstone")
  if redstone.getOutput("bottom") then
    redstone.setOutput("bottom", false)
  else
    redstone.setOutput("bottom", true)
  end
end

function ender()
 button.toggleButton("Ender Pearl")
  if redstone.getOutput("front") then
    redstone.setOutput("front", false)
  else
    redstone.setOutput("front", true)
  end
end

createButtons()

while true do
  getClick()
end