I wrote the tutorial code written in "creating you first script" in godot engine design philosophy . In the web , it shows godot icon rotation on the canvas . I did the same , but the icon of godot is there and it is not rotating.I didn't even get a typo or syntax error while writing GDscript script that makes rotate .Here is the code :-
extends Sprite
var speed = 400
var angular_speed = PI
func _process(delta):
rotation += angular_speed * delta