Added shaders

shaders/frag.frag

@@ -0,0 +1,7 @@
+#version 450
+layout(location = 0) out vec4 outColor;
+
+void main()
+{
+    outColor = vec4(1.0, 0.0, 0.0, 1.0); // red
+}

shaders/vert.vert

@@ -0,0 +1,13 @@
+#version 450
+
+vec2 positions[3] = vec2[]
+(
+    vec2(0.0, -0.5),
+    vec2(0.5, 0.5),
+    vec2(-0.5, 0.5)
+);
+
+void main()
+{
+    gl_Position = vec4(positions[gl_VertexIndex], 0.0, 1.0);
+}