How to make a block that despawns after a set time?

• Set the 'Tick rate' property to a higher number

• Create a new procedure

• Then, simply set a block of air

• Alternatively, you can create different blocks for different amounts of decay and slowly set the block to different stages of decayed blocks and then replace it with air.
• I hope this helps you with you mod!

I know this is pretty late, but I did this when trying to make a weapon that glows when you hold it and it flashes every time the block is replaced by air. Is there anyways to make it not do that?