//Indexes sent
{ 0, 1, 3, 1, 2, 3 }

//Attribute 1 (position)
{
0.0f, 0.0f, 0.0f,
0.5f, 0.0f, 0.0f,
0.5f, 0.5f, 0.0f,
0.0f, 0.5f, 0.0f
}

//Attribute 2 (color)
{
1.f, 0.f, 0.f,
0.f, 1.f, 0.f,
0.f, 0.f, 1.f,
1.f, 1.f, 1.f
}

//Vertex Shader
#version 400
layout(location = 0) in vec3 vp;
layout(location = 1) in vec3 incolor;
flat out vec3 vert_color;
void main() {
gl_Position = vec4(vp, 1.0);
vert_color = incolor;
}

//Frag Shader
#version 400
flat in vec3 vert_color;
out vec4 frag_color;
void main() {
frag_color = vec4(vert_color,1.0);
}