JavaScript variable value to fluctuate between two values -


i'm trying js variable fluctuate between 2 values on time.

for example, let's start var counter = 0, , every second variable increases one.

how make @ counter == 3 value decreases 1 until counter == -3, @ point increases again until 3 , down again, , on.

thanks in advance help!

you can :

var counter = 0; var inc = +1; setinterval(function(){     if(counter == 3) inc = -1;     if(counter == -3) inc = +1;     counter+= inc; }, 1000);

see sample : http://jsfiddle.net/vqfld/3/


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