Need Help home automation

Hi i have created simple relay control 8ch with blynk.

but i want it in more advance. when i press D1 button realy 1 is turning on. so i want to add widget led turn on. how to do it?

please can anyone give me sample or explain me/

Hello. Please have a look in our examples. For instance here https://github.com/blynkkk/blynk-library/blob/master/examples/More/ButtonInterrupt/ButtonInterrupt.ino

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