How do I fade loop

how to i make

when mouse clikc on object set opacity 100 - 20 and 20 - 80 like fade in fade out .. with loop infinity time

can be work with fade behavior ?

Probably, but it's just as easy to do it through events. Give your object two instance variables (I'll call them "goforit" and "fade" for the heck of it).

Now it's a little unclear exactly what you're looking for, but it sounds like you want to activate a fading loop/psuedo-flash once you click on an object. I also presume you want to turn the behavior off. By default, both values will be 0.

On Click, set "goforit" to 1. You'll use this as a toggle to active/deactivate the effect

From there, you'll just compare the state of the object and change the opacity accordingly.

Here is an image showing the events to make this in a very flexible way:

300 is the speed of the fade, the rest is state management.

can you send capx plz?/ im confused with sub oO

im my game i spawn alot same object,,, how is stop and start when i click a new object?

The capx would be a sprite, the mouse plugin, and then that exact event sheet. I screenshotted the entire thing. You might need to check out the manual or a tutorial on how sub-events and object-picking work--my capx wouldn't change anything with your understanding of those. If you're trying to affect multiple objects, you might need to look into "for each" loops as well.

also look at the sine behaviour which has an opacity movement setting...

why dont u use sine behavior opacity? it automatically creates a looping fade out in u only need to change the period magnitude random starting .. if u need any ...random start... keep in mind ... if u set magnitude to 20 that means the higher the sine will go to 20 opacity and lower ... if u set 100 the magnitude the sine will go to 100 opacity and below

you only need to trigger that bolean u made into enabling and disabling the sine... and when its enabled add a sub condition trigger once set opacity to 100 or what is ur max visibility point u want ...

RamPackWobble jinx ... didn't read ur comment before lol...