teste.lua

local comp = require("component")
local sides = require("sides")
local capacitor = comp.capacitor_bank
local term = require("term")

local maxEnergy = capacitor.getMaxEnergyStored()

function typeOnScreen(perc)
  term.setCursor(15, 1)
  lenPerc = string.len(perc)
  if lenPerc == 1 then
    term.write("  " .. perc .."%\n")
  elseif lenPerc == 2 then
    term.write(" " .. perc .."%\n")
  elseif lenPerc == 3 then
    term.write(perc .. "%\n")
  end
  term.setCursor(17, 5)
  print (capacitor.getEnergyStored())
end


function main()
  term.clear()
  print ("Capacitors at ")
  print ("\n\nTotal energy:   " .. maxEnergy)
  print ("Current Energy: ")
  while true do
    energyStored = capacitor.getEnergyStored()
    energyPerc = math.floor((energyStored / maxEnergy) * 100)
    if energyPerc <= 40 then
      comp.redstone.setOutput(sides.right, 0)
    elseif energyPerc >= 95 then
      comp.redstone.setOutput(sides.right, 15)
    end
    typeOnScreen(energyPerc)
    os.sleep(2)
  end
end


main()