energy

power = peripheral.wrap("tile_blockcapacitorbank_name_1")
mon = peripheral.wrap("right")

local maxPower = 0
local curPower = 0
local perPower = 0
local emergency = 0
monX, monY = mon.getSize()

function checkPower()
  maxPower = power.getMaxEnergyStored()
  curPower = power.getEnergyStored()
  perPower = math.floor(((curPower/maxPower)*100)+0.5)
  emergency = perPower
end

function writeMon()
  mon.setBackgroundColor(colors.blue)
  mon.clear()
  mon.setCursorPos(1,1)
 -- mon.write("Power")
  title = "  Power:" .. perPower .. "% Full "
  center(title,1,colors.lightGray,colors.red)

end


function center(text,line,backColor,textColor)
  mon.setBackgroundColor(backColor)
  mon.setTextColor(textColor)
  length = ( string.len(text))
  dif = math.floor(monX-length)
  x = math.floor(dif/2)
  mon.setCursorPos(x+1, line)
  mon.write(text)
end

function draw()
  bar = math.floor(((curPower/maxPower)*(monX-2))+0.5)
  mon.setCursorPos(2,monY-3)
  mon.setBackgroundColor(colors.red)
  mon.write(string.rep(" ", monX-2))

  mon.setCursorPos(2,monY-3)
  mon.setBackgroundColor(colors.green)
  mon.write(string.rep(" ", bar))

end



while true do
checkPower()
writeMon()
draw()
print(curPower .. "/" .. maxPower)
sleep(1)

if emergency < 10 then
  redstone.setOutput("back",true)
elseif emergency > 50 then
  redstone.setOutput("back",false)
end

end