add a new shader

shaders/wibble_wobble.gdshader

@@ -0,0 +1,9 @@
+shader_type canvas_item;
+
+uniform vec2 speed = vec2(0.0, 0.0);
+uniform vec2 ammount = vec2(0.0, 0.0);
+uniform vec2 offset = vec2(0.0, 0.0);
+
+void vertex() {
+	VERTEX += vec2(sin(TIME * speed.x), sin(TIME * speed.y)) * ammount + offset;
+}