How to make that after player collide with block something is doing? Screenshots will be great because I’m not good at using blueprints.
There are quite a few ways to do this. You could use overlap and hit events, or the easiest way is probably to add a trigger box around the block, then (with the trigger box selected) in the level blueprint right click and add a BeginOverlap node, this will let you make something happen when the player ‘overlaps’ with the object.
Actually using overlap events on the player and object is a better way to do this but a trigger is probably the easiest.
I made a quick video of how to do this with a trigger which you can see here.
Thanks! I forgot this method with trigger. 
No problem, using overlap and hit is better when your working with blueprint classes, there’s some decent info about it in the Unreal Launchpad tutorial here but triggers is definitely the easiest!