[ComputerCraft] Entity Sensor

-- FluidCows scanner for Plethora in ComputerCraft

interface = peripheral.wrap("back")
local canvas = interface.canvas()
local text
local entities = {}

local running = true
while running do
    local data = interface.sense()
    local count = 0
    entities = {}
    canvas.clear()

    for _, entity in pairs(data) do
        if (entity["name"] == "fluidcows.fluidcow") then
            entities[entity["id"]] = entity
            count = count + 1

            local distance = math.ceil(math.sqrt(math.pow(entity["x"],2)+math.pow(entity["y"],2)+math.pow(entity["z"],2)))

            text = canvas.addText({ x = 5, y = (10*count)+15 }, entity["displayName"].." ("..tostring(distance).."m)")
            text.setScale(1)

        end
    end

    for name, t in pairs(entities) do

    end

    text = canvas.addText({ x = 5, y = 5 }, "Entities: "..count)
    text.setScale(1)

    os.sleep(0.1)
end