[CC] Hang glider

rednet.open("left")
local count = 4
local time = 0
local lap = 0
local totalTime = 0
print("Time: "..os.clock())
while true do
    sleep(0)
    local id, msg, dist = rednet.receive()
    count = count - 1
    if count == 3 then
        time = os.clock()
        print("Started...")
    elseif count ~= 0 then
        lap = os.clock() - time
        time = os.clock()
        totalTime = totalTime + lap
        print("Check point "..(count * -1 + 3)..": "..lap)
    else
        lap = os.clock() - time
        time = os.clock()
        totalTime = totalTime + lap
        print("Check point "..(count * -1 + 3)..": "..lap)
        time = 0
        lap = 0
        count = 4
        print("Total: "..totalTime)
        totalTime = 0
    end
end