void DrawCube(GLfloat centerPosX, GLfloat centerPosY, GLfloat centerPosZ, GLfloat edgeLength)
{
    GLfloat halfSideLength = edgeLength * 0.5f;

    GLfloat vertices[] =
    {
        // front face
        centerPosX - halfSideLength, centerPosY + halfSideLength, centerPosZ + halfSideLength, // top left
        centerPosX + halfSideLength, centerPosY + halfSideLength, centerPosZ + halfSideLength, // top right
        centerPosX + halfSideLength, centerPosY - halfSideLength, centerPosZ + halfSideLength, // bottom right
        centerPosX - halfSideLength, centerPosY - halfSideLength, centerPosZ + halfSideLength, // bottom left

        // back face
        centerPosX - halfSideLength, centerPosY + halfSideLength, centerPosZ - halfSideLength, // top left
        centerPosX + halfSideLength, centerPosY + halfSideLength, centerPosZ - halfSideLength, // top right
        centerPosX + halfSideLength, centerPosY - halfSideLength, centerPosZ - halfSideLength, // bottom right
        centerPosX - halfSideLength, centerPosY - halfSideLength, centerPosZ - halfSideLength, // bottom left

        // left face
        centerPosX - halfSideLength, centerPosY + halfSideLength, centerPosZ + halfSideLength, // top left
        centerPosX - halfSideLength, centerPosY + halfSideLength, centerPosZ - halfSideLength, // top right
        centerPosX - halfSideLength, centerPosY - halfSideLength, centerPosZ - halfSideLength, // bottom right
        centerPosX - halfSideLength, centerPosY - halfSideLength, centerPosZ + halfSideLength, // bottom left

        // right face
        centerPosX + halfSideLength, centerPosY + halfSideLength, centerPosZ + halfSideLength, // top left
        centerPosX + halfSideLength, centerPosY + halfSideLength, centerPosZ - halfSideLength, // top right
        centerPosX + halfSideLength, centerPosY - halfSideLength, centerPosZ - halfSideLength, // bottom right
        centerPosX + halfSideLength, centerPosY - halfSideLength, centerPosZ + halfSideLength, // bottom left

        // top face
        centerPosX - halfSideLength, centerPosY + halfSideLength, centerPosZ + halfSideLength, // top left
        centerPosX - halfSideLength, centerPosY + halfSideLength, centerPosZ - halfSideLength, // top right
        centerPosX + halfSideLength, centerPosY + halfSideLength, centerPosZ - halfSideLength, // bottom right
        centerPosX + halfSideLength, centerPosY + halfSideLength, centerPosZ + halfSideLength, // bottom left

        // bottom face                                                                                                                                                                           // right face
        centerPosX - halfSideLength, centerPosY - halfSideLength, centerPosZ + halfSideLength, // top left
        centerPosX - halfSideLength, centerPosY - halfSideLength, centerPosZ - halfSideLength, // top right
        centerPosX + halfSideLength, centerPosY - halfSideLength, centerPosZ - halfSideLength, // bottom right
        centerPosX + halfSideLength, centerPosY - halfSideLength, centerPosZ + halfSideLength, // bottom left                                                                                                                                                                                                                                                                                                                                                                                                                                                  centerPosX + halfSideLength, centerPosY - halfSideLength, centerPosZ - halfSideLength, // bottom right                                                                                                                                                                                                                                                                                                                                                                                                                                                  centerPosX + halfSideLength, centerPosY - halfSideLength, centerPosZ + halfSideLength  // bottom left
    };

    GLubyte colour[] = {
    255,255,0, //yellow
    255,255,0,
    255,255,0,
    255,255,0,
    0,0,255,  // blue
    0,0,255,
    0,0,255,
    0,0,255,
    255,0,0,  // red
    255,0,0,
    255,0,0,
    255,0,0,
    0,255,0, // lime
    0,255,0,
    0,255,0,
    0,255,0,
    102,0,204, // purple
    102,0,204,
    102,0,204,
    102,0,204,
    192,192,192,  // white
    192,192,192,
    192,192,192,
    192,192,192,
    };

    glEnableClientState(GL_VERTEX_ARRAY);
    glEnableClientState(GL_COLOR_ARRAY);
    glVertexPointer(3, GL_FLOAT, 0, vertices);
    glColorPointer(3,GL_UNSIGNED_BYTE, 0, colour);
    glDrawArrays(GL_QUADS, 0, 24);
    glDisableClientState(GL_VERTEX_ARRAY);
    glDisableClientState(GL_COLOR_ARRAY);