# Random alpha change
**URL:** https://forum.kirupa.com/t/random-alpha-change/59098
**Category:** flash
**Created:** [July 28, 2004, 1:40pm UTC](https://forum.kirupa.com/t/random-alpha-change/59098 "2004-07-28T13:40:56Z")
**Posts on this page:** 14
**Page:** 1
### Author:  [@keljnr](https://forum.kirupa.com/u/keljnr)
#### Post date: [July 28, 2004, 1:40pm UTC](https://forum.kirupa.com/t/random-alpha-change/59098/1 "2004-07-28T13:40:56Z")
Hi people. I want to make each of the squares (pictured below) change alpha every second or so. (fading).
Is actionscript needed to do this? can anyone help?
Cheers
---
### Author:  [@system](https://forum.kirupa.com/u/system)
#### Post date: [July 28, 2004, 1:51pm UTC](https://forum.kirupa.com/t/random-alpha-change/59098/2 "2004-07-28T13:51:13Z")
Use yourMC.\_Alpha = number to set the alpha (do it in a function)
Use setInterval(functionName, interval) to call the function every “interval”.
and stop when alpha = 0;
🙂
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### Author:  [@system](https://forum.kirupa.com/u/system)
#### Post date: [July 28, 2004, 1:56pm UTC](https://forum.kirupa.com/t/random-alpha-change/59098/3 "2004-07-28T13:56:32Z")
or…
onEnterFrame = function() {
myMC.\_alpha = random(0,100);
}
i think that’s the syntax… 🙂
:p:
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### Author:  [@system](https://forum.kirupa.com/u/system)
#### Post date: [July 28, 2004, 2:04pm UTC](https://forum.kirupa.com/t/random-alpha-change/59098/4 "2004-07-28T14:04:21Z")
cheers for the quick responce but i get this error:
**Error** Scene=Scene 1, layer=Layer 2, frame=1:Line 2: Wrong number of parameters; random requires exactly 1.
myMC.\_alpha = random(0,100);
Total ActionScript Errors: 1 Reported Errors: 1
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### Author:  [@system](https://forum.kirupa.com/u/system)
#### Post date: [July 28, 2004, 2:10pm UTC](https://forum.kirupa.com/t/random-alpha-change/59098/5 "2004-07-28T14:10:17Z")
ah… right…
for (var i = 0; i\<=10; i++) {
ball.duplicateMovieClip(“ball”+i, i);
ball.\_alpha = random(100);
ball.\_x = i\*70
}
there ya go. did that just for you. i’ve got the fla if you wanna see it 😛
:p:
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### Author:  [@system](https://forum.kirupa.com/u/system)
#### Post date: [July 28, 2004, 2:12pm UTC](https://forum.kirupa.com/t/random-alpha-change/59098/6 "2004-07-28T14:12:08Z")
function alfachange (targetmc){if(targetmc.\_alpha \>0){targetmc.\_alpha = targetmc.\_alpha - 10}}
setInterval(alfachange , 1000)
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### Author:  [@system](https://forum.kirupa.com/u/system)
#### Post date: [July 28, 2004, 2:12pm UTC](https://forum.kirupa.com/t/random-alpha-change/59098/7 "2004-07-28T14:12:30Z")
thanks!!
yeah, id love ta c the FLA.
cheers.
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### Author:  [@system](https://forum.kirupa.com/u/system)
#### Post date: [July 28, 2004, 2:14pm UTC](https://forum.kirupa.com/t/random-alpha-change/59098/8 "2004-07-28T14:14:28Z")
it’s for flash mx 04… lemme know if you need an mx.
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### Author:  [@system](https://forum.kirupa.com/u/system)
#### Post date: [July 28, 2004, 2:18pm UTC](https://forum.kirupa.com/t/random-alpha-change/59098/9 "2004-07-28T14:18:22Z")
i have get it to work, but i dont want all those random balls. just 1 ball with a random changing alpha.
cheers
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### Author:  [@system](https://forum.kirupa.com/u/system)
#### Post date: [July 28, 2004, 2:19pm UTC](https://forum.kirupa.com/t/random-alpha-change/59098/10 "2004-07-28T14:19:58Z")
ok.
onEnterFrame = function() {
box.\_alpha = random(100);
}
throw that on a frame and see what happens. give your squares the instance of box.
:p:
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### Author:  [@system](https://forum.kirupa.com/u/system)
#### Post date: [July 28, 2004, 2:25pm UTC](https://forum.kirupa.com/t/random-alpha-change/59098/11 "2004-07-28T14:25:03Z")
thats the one fella, cheers!
i knew i could rely on you guys.
Is there anyway i could make the alpha fade to the changing alpha instead of it just jerkin?
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### Author:  [@system](https://forum.kirupa.com/u/system)
#### Post date: [July 28, 2004, 2:26pm UTC](https://forum.kirupa.com/t/random-alpha-change/59098/12 "2004-07-28T14:26:38Z")
that’s a bit more advanced… let’s see here…
onEnterFrame = function() {
newAlpha = random(100);
box.\_alpha += newAlpha;
}
try that, lemme know.
:p:
//edit, actually, i don’t think that will work… i’ll play w/ it in flash.
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### Author:  [@system](https://forum.kirupa.com/u/system)
#### Post date: [July 28, 2004, 2:44pm UTC](https://forum.kirupa.com/t/random-alpha-change/59098/13 "2004-07-28T14:44:37Z")
no it didnt work. but dont need ta mess about with it tho, im happy with the one you gave us before.
thanks alot.
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### Author:  [@system](https://forum.kirupa.com/u/system)
#### Post date: [July 28, 2004, 2:44pm UTC](https://forum.kirupa.com/t/random-alpha-change/59098/14 "2004-07-28T14:44:43Z")
poo… flash sucks… someone else’s gonna have to help ya 😉