GLfloat colourVert[] = {
        0.0f, 1.0f, 0.0f,
        1.0f, 0.0f, 0.0f,
        0.0f, 0.0f, 1.0f
    };



GLuint colourBuffer;
glGenBuffers(1, &colourBuffer);
glBindBuffer(GL_ARRAY_BUFFER, colourBuffer);
glBufferData(GL_ARRAY_BUFFER, sizeof(colourVert), colourVert, GL_DYNAMIC_DRAW);
glEnableVertexAttribArray(1);
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 0, 0);