Draconic Energy Core Readout

monitor = peripheral.wrap("back")
term.redirect(monitor)

p = peripheral.wrap("draconic_rf_storage_3")

term.setBackgroundColor(colors.white)
term.setTextColor(colors.black)

function Pos(x,y)
   term.setCursorPos(x,y)
end

function shorten(str)
   tostring(str)
   str = string.sub(str, 1, 6)
   return str
end

function UpdateReadout()
   current = p.getEnergyStored()
   maximum = p.getMaxEnergyStored()
   term.clear()
   Pos(1,1)
   term.write("      Draconic Energy Core:")
   monitor.setTextScale(1.5)
   Pos(1,3)
   term.write("  Stored Energy:  "..current)
   Pos(1,5)
   term.write("     Max Energy: "..maximum)
   Pos(1,7)
   amountInt = ((current * 100) / maximum)
   term.write("        Percent: "..shorten(amountInt))
end

while true do
   UpdateReadout()
  os.sleep(0.5)
end