startup

local x = 1
 wsstat = true
 blstat = true
 zpstat = true

term.clear()

while true do
        term.setCursorPos(1,1)

        term.setBackgroundColor((x==1) and colors.blue or colors.black)
        term.setTextColor(wsstat and colors.red or colors.green)
        print("Wither Skeletons: "..(wsstat and "Off" or "On "))

        term.setBackgroundColor((x==2) and colors.blue or colors.black)
        term.setTextColor(zpstat and colors.red or colors.green)
        print("Zombie Pigmen: "..(zpstat and "Off" or "On "))

        term.setBackgroundColor((x==3) and colors.blue or colors.black)
        term.setTextColor(blstat and colors.red or colors.green)
        term.write("Blazes: "..(blstat and "Off" or "On "))

         event, key = os.pullEvent("key")

        if key == 208 then   -- Down key pressed
                x = x + 1
                if x > 3 then x = 1 end
        end

        if key == 200 then   -- Up key pressed
                x = x - 1
                if x < 1 then x = 3 end
        end

        if key == 28 or key == 57 then   -- Enter or space keys pressed
                if x == 1 then
                     wsstat = not wsstat
                      redstone.setOutput("back", wsstat)
                elseif x == 2 then
                        zpstat = not zpstat
                        rs.setOutput("right", zpstat)
                elseif x == 3 then
                        blstat = not blstat
                        rs.setOutput("left", blstat)
                end
        end
end