Added first round of graphics

Arkanoid.gdshader

@@ -0,0 +1,17 @@
+shader_type canvas_item;
+
+void vertex() {
+	// Called for every vertex the material is visible on.
+}
+
+void fragment() {
+	// Called for every pixel the material is visible on.
+	if (COLOR.rgba == vec4(1.0, 0.0, 1.0, 1.0)) {
+		COLOR.rgb = vec3(UV.y * 8.0, UV.y * 6.0, 1.0 - (UV.y * 14.0));
+	}
+}
+
+//void light() {
+	// Called for every pixel for every light affecting the CanvasItem.
+	// Uncomment to replace the default light processing function with this one.
+//}