# Hearth beat with led **URL:** \ **Category:** Uncategorized\ **Created:** [October 29, 2019, 11:59am UTC](https://forum.xod.io/t/hearth-beat-with-led/2749 "2019-10-29T11:59:38Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![leopochappe0711](https://avatars.discourse-cdn.com/v4/letter/l/dfb087/32.png) [@leopochappe0711](https://forum.xod.io/u/leopochappe0711)\ **Post date:** [October 29, 2019, 11:59am UTC](https://forum.xod.io/t/hearth-beat-with-led/2749/1 "2019-10-29T11:59:38Z")
Good Morning everybody, I’m a Design student and just start to use the software/. I’m an early beginner. I have a first PROTOTYPES of Smart Objets to render shortly and my system is not working. Let me explain: the initial position of my system is a pressed button that blinks a red led (like a fast heartbeat). When the button is released, the heart (led) continues to beat (blink), but gradually slows down for 5 sec. That’s all It’s been several hours since I’ve been trying to get something but it’s not very conclusive. If anyone can help me move forward on my project I would be very grateful! Good day to all Léopoldine ---
**Author:** ![gweimer](https://avatars.discourse-cdn.com/v4/letter/g/a9adbd/32.png) [@gweimer](https://forum.xod.io/u/gweimer)\ **Post date:** [October 29, 2019, 5:21pm UTC](https://forum.xod.io/t/hearth-beat-with-led/2749/2 "2019-10-29T17:21:40Z")
Since you want to gradually slow the blink time, that would indicate you probably want to use a fade node. Since on button press you want to immediately go to fast blink, the rate for fade as well as the target needs to change. I suggest using two if-else nodes to specify those values based on button press. flip-n-times seems like the way to do the blink, except you do not want to limit to n times, so probably just a delay feeding a flip-flop for blink. Here is one option (note how delay auto-resets itself to continue the blinking): ![image](https://canada1.discourse-cdn.com/flex027/uploads/xod/original/2X/b/b8ac78f218b2e8a940ec6650057c9b86cb34e929.png)