Ok so I have a setup with two platforms and a killbox. The player is meant to jump onto a block in the middle of these two platforms in order to get across. Beneath them is a pit with a trigger_hurt that will kill them if they miss the jump. The platform is meant to break after being jumped on to add some difficulty to it before respawning so the next player can attempt the jump.
First I made a 128x128 block, pressed the button "ToEntity", changed the class to funk_breakable, named it platform then enabled the flag "Only Break On Trigger".
Then I created an entity called "point_template", enabled the flag "don't remove template entities", under class info set template 1 to "platform" then named it platform_template.
After that I created an entity called "env_entity_maker and named it platform_maker.
Then I added a trigger brush on top of the block, clicked "ToEntity", classed it as trigger_multiple then I went to outputs and under "My Output Named" I put OnStartTouchAll, Under "target entities named" put platform and "Via This Input" as Break. I also changed "After A Delay In Seconds" to 0.50.
After that I added another output again under "My Output Named" I put OnStartTouchAll, Under "Target Entities Named" I put platform_maker, then "Via This Input" I put ForceSpawn. For the respawn of the block I changed "After A Delay In Seconds" to 1.50.