cube = peripheral.wrap("left")

energy = cube.getEnergy()

PrintCentered(energy .. " RF")

local w, h = term.getSize()
local x, y = term.getCursorPos()
x = math.max(math.floor((w / 2) - (#energy .. " RF" / 2)), 0)
term.setCursorPos(x, y)
print(energy .. " RF")