shaders

-------- one.vsh ---
#version 330 core

layout(location= 0) in vec4 vPosition;

void main() {
    gl_Position = vPosition;
}

-------- one.fsh ---
#version 330 core

out vec4 fColor;

void main() {
    fColor = vec4(0.0, 0.0, 1.0, 1.0);
}