import bge

cont = bge.logic.getCurrentController()
bge.logic.setLogicTicRate(60.0)

act = cont.actuators['objTimer']

if act.value == '':
    time = 0.0

if act.value != '':
    time = float(act.value)

if time < 60.0:
    time += 0.01

if time == 60.0:
    time = 0

act.value = str(time)

VertexShader = """
    varying vec4 texCoords;
    void main() // all vertex shaders define a main() function
    {
        texCoords = gl_MultiTexCoord0; // in this case equal to gl_Vertex
        gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
         // this line transforms the predefined attribute gl_Vertex
         // of type vec4 with the predefined uniform
         // gl_ModelViewProjectionMatrix of type mat4 and stores
         // the result in the predefined output variable gl_Position
         // of type vec4. (gl_ModelViewProjectionMatrix combines
         // the viewing transformation, modeling transformation and
         // projection transformation in one matrix.)
    }
"""

FragmentShader = """
    varying vec4 texCoords;
    uniform float time;
    void main()
    {
      //gl_FragColor = texture2D(textureUnit, texCoords * 2.);
      gl_FragColor = vec4(1.0, 0.0 + time, 0.0, 1.0);
         // red, green, blue, alpha
   }
"""

mesh = cont.owner.meshes[0]
for mat in mesh.materials:
    shader = mat.getShader()
    if shader != None:
        if not shader.isValid():
            shader.setSource(VertexShader, FragmentShader, 1)
            #shader.setSampler('textureUnit', 0)
            shader.setUniform1f('time',time)
            print(time)