//Attributes & Uniforms
    sMVPMatrixHandle = glGetUniformLocation(programHandle, "u_MVPMatrix");
    checkGlError("mvpHandle");
    sPositionHandle = glGetAttribLocation(programHandle, "a_Position");
    checkGlError("positionHandle");
    lightposHandle = glGetUniformLocation(programHandle, "lightpositions");
    checkGlError("lightposHandle");
//  lightcolorHandle = glGetUniformLocation(programHandle, "lightcolors");
//  checkGlError("lighcolorhandle");

SHADER

precision highp float;

//uniform vec4 lightcolors[4];
uniform vec2 lightpositions[4];

void main() {
    vec4 result;

    for (int i = 0; i < 4; i++) {
        vec2 pixel = gl_FragCoord.xy;
        vec2 aux = lightpositions[i] - pixel;
        float distance = length(aux);
        float attenuation = 1.0 / (1.0 + 0.001 * distance + 0.009 * distance); //Hoe hoger de waardes des te meer licht

        gl_FragColor = vec4(attenuation, attenuation, attenuation, 1.0);
    }
//  gl_FragColor = result;

}