energy.lua

local component = require("component")
local pc = component.computer
local gpu = component.gpu
local energy = component.basic_energy_cube

local counter = 0
local w, h = gpu.getResolution()
local max_energy = energy.getMaxEnergyStored()

function progressBar(ab, cd)
  local presizedw = ((w - 15) / cd * ab)
  gpu.setBackground(0x000000, false)
  gpu.fill(3, 10, w - 15, 2, " ")

  gpu.setBackground(0x09EF70, false)
  gpu.fill(3, 10, presizedw, 2, " ")
  gpu.setBackground(0x123123, false)
end

function startRendering()
  local active_energy = energy.getEnergyStored()

  gpu.fill(1, 1, w, h, " ")
  gpu.setForeground(0x000000, false)
  gpu.setBackground(0xD9D9D9, false)

  progressBar(active_energy, max_energy)

  gpu.set(w / 2, h / 2, "energy: " .. active_energy)
  gpu.setForeground(0x0980EF)

end

function caller()
  while true do
    os.sleep(0.5)
    startRendering()
  end
end

caller()