RFTools Endergenic Control

local e_cell = peripheral.wrap("left")
local redstone_side = "right"
local stored = 0
local prevStored = 0
local percentage = 0
local status = "Idle"

local function setStored()
    stored = e_cell.getEnergyStored()
end

local function check()
    setStored()
    if (stored == 0) then
        percentage = 0
    else
        percentage = stored / e_cell.getMaxEnergyStored()
    end

    if (0.9 <= percentage) then
        status = "Idle"
        rs.setOutput(redstone_side, false)
    elseif (0.2 >= percentage) then
        status = "Generating"
        rs.setOutput(redstone_side, true)
    end
end

local function displayStatus()
    term.clear()
    term.setCursorPos(1,1)
    print("     Status: "..status)
    if (stored == 0) then
        print("Energy Cell: 0%")
    else
        print("Energy Cell: "..math.floor(((percentage * 100) * 100) / 100).."%")
    end

end

while true do
    check()
    displayStatus()
    prevStored = stored
    os.sleep(5)
end