EssenceManager

local essenceTank = peripheral.wrap("top")
local tankInfo = essenceTank.getTankInfo("unknown")[1]
local capacity = tankInfo.capacity or 0
local amount = tankInfo.amount or 0
local percentage = 0

local threshold = 90
local lagbuster = 10

local rs_side = "left"
local rs_color = colors.lightBlue


local function getAmount()
  tankInfo = essenceTank.getTankInfo("unknown")[1]
  amount = tankInfo.amount or 0
end

local function getPercent()
  getAmount()
  percentage = math.floor(amount/capacity*100)
  print("Percent filled: ", tostring(percentage),"%")
end

local function setRedstone()
  getPercent()
  if percentage > threshold then
    rs.setBundledOutput(rs_side, rs_color)
    print("Above")
  else
    rs.setBundledOutput(rs_side, 0)
    print("Below")
  end
end

local function main()
  while true do
    setRedstone()
    sleep(lagbuster)
  end
end
main()