Redstone Energy Cell Control

cell_position = "front"
latch = false

cell = peripheral.wrap(cell_position)

while(true) do
  capacity = 100*cell.getEnergyStored(cell_position)/cell.getMaxEnergyStored(cell_position)
  capacity = math.floor(capacity)

  if (latch == false) then
    if (capacity <= 100 and capacity >= 80) then
      redstone.setBundledOutput("back", 0)
    elseif (capacity < 80 and capacity >= 60) then
      redstone.setBundledOutput("back", colors.white)
    elseif (capacity < 60 and capacity >= 40) then
      redstone.setBundledOutput("back", colors.combine(colors.white,colors.orange))
    elseif (capacity < 40 and capacity >= 20) then
      redstone.setBundledOutput("back", colors.combine(colors.white,colors.orange,colors.magenta))
    elseif (capacity < 20 and capacity >= 0) then
      redstone.setBundledOutput("back", colors.combine(colors.white,colors.orange,colors.magenta,colors.lightBlue))
      latch = true
    end
  elseif (latch == true) then
    if (capacity <= 99) then
      redstone.setBundledOutput("back", colors.combine(colors.white,colors.orange,colors.magenta,colors.lightBlue))
    elseif (capacity > 99) then
    latch = false
    end
  end
  stages_active = redstone.getBundledOutput("back")
  print("Capacity: "..capacity.."% / Stages Active: "..stages_active)

  os.sleep(5)
end