solved set uniform value on Custom Standard Material

[Pryme8]

when doing something like this:
 

var mat = new BABYLON.CustomMaterial("cMat",scene);

mat.Fragment_Definitions(

`uniform float time;`

)

mat.Fragment_Before_FragColor(

`color.r = sin(time);`

);

how do I set the time float now?
if it was a shaderMaterial it would be .setFloat but that is not an option here.

I tried onBindObserverable.add(function(effect){

effect.setFloat...

})


*EDIT* I found the answer. On one of @NasimiAsl's examples