I wanted Scratch Link to Play Store so i could use devices like micro:bit on Android devices and Chromebooks.
Well, guess that's it

when green flag clicked
forever
display current temperature on [°C v] ::microbit
if <(temperature on [°C v] ::microbit) > [50]> then
destroy your micro:bit with power of [3g v] ::microbit

That's a fake block so don't worry