Cross device eventor

I have one Blynk project with 5 devices. I need a cross device eventor widget which can do things like:

“If device_A v80 is higer than 28 then device_B v0 is high”

Note: device_A is a sensr device and device_b is a relay.

I thik this function is very very useful. Please help!

then it is better to use bridge widget which is designed for this purpose