DrawBattery

m = peripheral.wrap("monitor_0")
cell1 = peripheral.wrap("redstone_energy_cell_2")
cell2 = peripheral.wrap("redstone_energy_cell_3")
cell3 = peripheral.wrap("redstone_energy_cell_4")
cell4 = peripheral.wrap("redstone_energy_cell_5")
cell5 = peripheral.wrap("redstone_energy_cell_6")
cell6 = peripheral.wrap("redstone_energy_cell_7")
m.setTextScale(0.5)
m.setTextColor(colors.white)
m.setBackgroundColor(colors.black)
m.clear()
m.setBackgroundColor(colors.blue)

function draw(x,percent)
  for y = 38, 4, -1 do
    m.setCursorPos(x,y)
    for i = 1, 10 do
      if (i == 1) or (i == 10) or (y == 38) or (y == 4) then
        m.setBackgroundColor(colors.red)
      elseif (y <= 37-(percent/3)) then
        m.setBackgroundColor(colors.white)
      else
        m.setBackgroundColor(colors.blue)
      end
    m.write(" ")
    end
  end
  m.setCursorPos((x+3),2)
  m.write(percent.."%")
end

while true do
  m.setBackgroundColor(colors.black)
  m.clear()
  total = cell1.getEnergyStored() + cell2.getEnergyStored() + cell3.getEnergyStored() +
          cell4.getEnergyStored() + cell5.getEnergyStored() + cell6.getEnergyStored()
  if total < 1800000 then
    rs.setOutput("right", true)
  end
  if total > 3500000 then
    rs.setOutput("right", false)
  end
  draw(5,math.floor(cell1.getEnergyStored()/6000))
  draw(17,math.floor(cell2.getEnergyStored()/6000))
  draw(29,math.floor(cell3.getEnergyStored()/6000))
  draw(41,math.floor(cell4.getEnergyStored()/6000))
  draw(53,math.floor(cell5.getEnergyStored()/6000))
  draw(65,math.floor(cell6.getEnergyStored()/6000))
  os.sleep(5)
end