Javascript effect error

Hi, I'm currently trying to make a fast motion blur effect for my game

Here is the fx's file code:

//////////////////////////////////////////////////////////////////////////
// Motion Blur effect
varying mediump vec2 vTex;
uniform mediump sampler2D samplerFront;
uniform mediump float quality;
uniform mediump float seconds;

function scrUpdater() {
		mediump vec4 front = texture2D(samplerFront, vTex);
        gl_FragColor = front + oldfront*quality/100 ;
    }

void main(void)
{
	if (seconds == 0){
		mediump vec4 front = texture2D(samplerFront, vTex);
        gl_FragColor = front;
	}
	else {
		mediump vec4 oldfront = texture2D(samplerFront, vTex);
		setTimeout(scrUpdater(), 10);
	}
}

[/code:q701en8b]

When I use it in Construct 2, I get this error:

[img="http://image.noelshack.com/fichiers/2015/52/1450886713-javascript-error.png"]

Can someone help me?

Looks like you are mixing C and JavaScript. 'function' is not a valid keyword, and I don't think setTimeout() is a valid call.

What should I put in its place?

I've seen many tutorials like this one: (add in http)://www.w3schools.com/js/js_functions.asp

They all use 'function'.

Also, for the setTimeout() call, it doesn"t give me any error, and I've seen it here:

(add in http)://stackoverflow.com/questions/14226803/javascript-wait-5-seconds-before-executing-next-line

As far as I know effects use the 'OpenGL Shading Language' not Javascript. So javascript doesn't work here.

Asmodean Ah. Well that's a huge mistake I made!

Thank you mate x)

EDIT: Sooooo... I don't have a single chuking idea of how to translate this into OpenGL Shading Language. Can someone help me here?

Does the following Shader tutorial from gigatron help at all?

https://www.scirra.com/tutorials/4900/shader-toy-to-c2

Mmh, I managed to get a motion blur to work, however this was absolutely not what I expected...

I expected to get something like that: (https)://www.scirra.com/forum/request-directional-blur_t122854

Or at least like that: (https)://youtu.be/Siud1xP8Veg

*moved to the more appropriate 'Effects' section