Reactor

local reactor = peripheral.wrap("back")
local mon_rf = peripheral.wrap("monitor_1")
local mon_stat = peripheral.wrap("monitor_2")
local powerdraw = 0

function showPowerDraw()
    local powerStart = reactor.getEnergyStored()
    os.sleep(0.05) -- a tick
    powerdraw = powerStart - reactor.getEnergyStored()
    mon_rf.clear()
    mon_rf.setCursorPos(1,1)
    mon_rf.setTextScale(2)
    mon_rf.write( powerdraw.." RF/t")
end

function showStatus(status)
    mon_stat.clear()
    mon_stat.setCursorPos(1,1)
    mon_stat.setTextScale(2)
    mon_stat.write(status)
end

function chargeReactor()
    showStatus("Active")
    reactor.setActive(true)
    while( reactor.getEnergyStored() < 9000000 ) do
        os.sleep(5)
        showPowerDraw()
    end
    showStatus("Inactive")
    reactor.setActive(false)
end

function waitForReactorAccess()
    while(not reactor.getConnected()) do
        os.sleep(1)
    end
end

waitForReactorAccess()
while true do
    showPowerDraw()
    if(reactor.getEnergyStored() < 50000) then
        chargeReactor()
    else
        reactor.setActive(false)
        showStatus("Inactive")
    end
    os.sleep(10)
end