Pull

print("pull")

sleep(1)

n = 0
sum = 0
time = 0

local vari = {}

 while true do

  os.pullEvent("redstone")
  y = os.clock() - time
  local time = os.clock()

  os.pullEvent("redstone")
  x = os.clock() - time
  --print("t: "..x)
  local time = os.clock()

  sum = x+sum
  n = n+1
  table.insert(vari,x)
  med = sum/n

  print("t: "..x.." med: "..med.."  n: "..n)

  if n > 3 then
   if med < 0.2 then
    break
   end
  end

 end

sum2 = 0
n2 = table.getn(vari)

for i=1,n2 do
sum2 = sum2+math.pow(vari[i]-med,2)
end
s = math.sqrt((1/n)*sum2)

term.clear()
term.setCursorPos(1,1)
print("data")
print("t: "..x.." med: "..med.." n:"..n)
print("s: "..s)