function start()
shell.run('clear')
print("Please select an option:\n[1] Enable FF\n[2] Disable FF\n[3] Create wither\n[4] (Debug mode) - Retract wither spawners\n[5] (Debug mode) Spawn wither - FAILS IF FF IS ON")
p1 = ""
local event, choice = os.pullEvent("char")
if choice == "1" then
ffon = true
redstone.setBundledOutput("bottom", colors.white)
start()
end
if choice == "2" then
ffon = false
redstone.setBundledOutput("bottom", 0)
start()
end
if choice == "3" then
if ffon == false then
redstone.setBundledOutput("bottom", colors.magenta)
sleep(1.5)
redstone.setBundledOutput("bottom", colors.blue)
sleep(1)
redstone.setBundledOutput("bottom", colors.orange)
sleep(1)
redstone.setBundledOutput("bottom", 0)
start()
end
if ffon == true then
print("Unable to start - Forcefield is currently on.")
start()
end
end
if choice == "4" then
redstone.setBundledOutput("bottom", colors.orange)
sleep(1)
redstone.setBundledOutput("bottom", 0)
start()
end
if choice == "5" then
redstone.setBundledOutput("bottom", colors.blue)
sleep(1)
redstone.setBundledOutput("bottom", 0)
end

end --End function

start()