diff --git a/MyObsidianVault/Godot_Training/2D/Tutorial Game 4 - Telling a story/M7.L11 - Animate Sophia sliding in/Node opacity.md b/MyObsidianVault/Godot_Training/2D/Tutorial Game 4 - Telling a story/M7.L11 - Animate Sophia sliding in/Node opacity.md
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+ A UI nodes' opacity is modified via the modulate property which controls the tinting of the node.
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diff --git a/MyObsidianVault/Godot_Training/2D/Tutorial Game 4 - Telling a story/M7.L11 - Animate Sophia sliding in/Tweens.md b/MyObsidianVault/Godot_Training/2D/Tutorial Game 4 - Telling a story/M7.L11 - Animate Sophia sliding in/Tweens.md
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+Tweens are created using a nodes' create_tween() method
+
+
+```python
+func slide_in() -> void:
+	var tween := create_tween()
+	tween.set_trans(Tween.TRANS_QUART)
+	tween.set_ease(Tween.EASE_OUT)
+````
+
+Running tweens in parallel via parallel method.
+Modulate controls tinting, subproperty a is for alpha, meaning a target visibilty of 100%
+```python
+tween.parallel().tween_property(body, "modulate:a", 1.0, 0.2)
+```
+
+
+Full tween method:
+```python
+func slide_in() -> void:
+	var tween = create_tween()
+	tween.set_trans(Tween.TRANS_QUART)
+	tween.set_ease(Tween.EASE_OUT)
+	body.position.x = 200.0
+	tween.tween_property(body, "position:x", 0.0, 1.0) # Move x from 200 to 0
+	body.modulate.a = 0.0 # UI node visibility = 0
+	tween.parallel().tween_property(body, "modulate:a", 1.0, 1.0) # Animate visibility towards 100% (a=alpha)
+```
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