Copy the "Start timer" line.
In the On Timer trigger, you need to restart your timer with the same action that started it, to get a new random value.
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Sprite:VALUE=1 -> SUM_VAL = Sprite.PickedCount
A loop would do it. You have to reset your sum to 0 at the beginning.
Can't find "Sprite Bank".
Use the Timer behavior to set a period for each object.
https://www.scirra.com/manual/167/timer
https://www.scirra.com/manual/52/import-audio
If you import a WAV file, C2 will create a .ogg and a .m4a file for you. Both are included in the project. If you are doing it manually, you have to import both formats.
The problem with division is it doesn't allow for var=0.
You can make your own sign() function, that returns 1, -1, 0, base on the parameters sign.
Same here! (emailed Support).
v1.2 now includes an animated puzzle example.
Construct2 is already a giant while loop. The script repeats 60-times a second. You almost never need a while-loop. Run though the tutorials - they should help clarify how the engine works.
https://www.scirra.com/tutorials/top
http://www.blackhornettechnologies.com/Construct2Stuff/layouts_BHT.capx
Tweaked a few things but setting the angle to the player seems OK.
http://www.blackhornettechnologies.com/Construct2Stuff/LASER_CHECK_SYSTEM_BHT.capx
A bit late to the party, but oh well.
I don't think I can help anymore without the CAPX.