first work

scenes/playground/ball/Ball.gd

@@ -0,0 +1,21 @@
+extends RigidBody2D
+
+
+const SPEED = 300.00
+
+
+func _ready():
+	randomize()
+
+	global_position = Vector2(640, 360)
+
+	var x_direction = pow(-1, randi() % 2)
+	var y_direction = pow(-1, randi() % 2)
+
+	await get_tree().create_timer(1.0).timeout
+	
+	linear_velocity = Vector2(x_direction, y_direction) * SPEED
+
+func _process(delta):
+	pass
+

scenes/playground/ball/Ball.tscn

@@ -0,0 +1,27 @@
+[gd_scene load_steps=4 format=3 uid="uid://dmsd30hc2ob1w"]
+
+[ext_resource type="Script" path="res://scenes/playground/ball/Ball.gd" id="1_vsr7q"]
+
+[sub_resource type="PhysicsMaterial" id="PhysicsMaterial_h7mi1"]
+friction = 0.0
+
+[sub_resource type="RectangleShape2D" id="RectangleShape2D_bdxrg"]
+size = Vector2(32, 32)
+
+[node name="Ball" type="RigidBody2D"]
+mass = 0.01
+physics_material_override = SubResource("PhysicsMaterial_h7mi1")
+gravity_scale = 1.66533e-16
+can_sleep = false
+lock_rotation = true
+freeze_mode = 1
+linear_damp_mode = 1
+script = ExtResource("1_vsr7q")
+
+[node name="ColorRect" type="ColorRect" parent="."]
+offset_right = 40.0
+offset_bottom = 40.0
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="."]
+position = Vector2(20, 20)
+shape = SubResource("RectangleShape2D_bdxrg")