Laser Control v1

local monitors = {
    peripheral.wrap("top");
    peripheral.wrap("monitor_0");
}

local bool loading = false;
local onColor = colors.yellow;
local offColor = colors.blue;
local defaultColor = colors.white;

--clears all monitors
function clear()
  for i=1, #monitors do
    monitors[i].clear()
    monitors[i].setTextColor(defaultColor)
    monitors[i].setCursorPos(1,1)
  end
end

--goes to the next line for all monitors
function nextline()
  for i=1, #monitors do
    local x,y = monitors[i].getCursorPos()
    local y = y + 1
    monitors[i].setCursorPos(1,y)
  end
end

--writes text on all monitors
function writeText(text)
  for i=1, #monitors do
    monitors[i].write(text)
  end
end

--sets text color for all monitors
function textColor(color)
  for i=1, #monitors do
    monitors[i].setTextColor(color)
  end
end

--sets background color for all monitors
function backgroundColor(color)
  for i=1, #monitors do
    monitors[i].setBackgroundColor(color)
  end
end


function routine()
    if loading == true then
        backgroundColor(onColor);
        rs.setOutput("back",false);
    else
        backgroundColor(offColor);
        rs.setOutput("back",true);
    end
    for i=1, #monitors do
        clear();
        local x,y = monitors[i].getSize();
        y = math.floor(y/2);
        x = math.floor(x/2);
        if loading == true then
            x = x -3;
            monitors[i].setTextColor(defaultColor);
            monitors[i].setCursorPos(x,y);
            monitors[i].write("Charging");
        else
            x = x -1;
            monitors[i].setTextColor(defaultColor);
            monitors[i].setCursorPos(x,y);
            monitors[i].write("Idle");
        end
    end
end

while true do
    local timer = os.startTimer(1)
    local event,a1,a2,a3 = os.pullEvent()
    if event == "timer" then
        routine()
    elseif event == "monitor_touch" then
        routine()
        local x = a2;
        local y = a3;
        loading = not loading;
    end
end