Function Tween.interpolateProperty

Animates property of object from initial_val to final_val for duration seconds, delay seconds later. Setting the initial value to null uses the current value of the property. Use transitiontype for trans_type and easetype for ease_type parameters. These values control the timing and direction of the interpolation. See the class description for more information.

bool interpolateProperty(NodePathArg1, VariantArg2, VariantArg3) (
  GodotObject object,
  in NodePathArg1 property,
  in VariantArg2 initial_val,
  in VariantArg3 final_val,
  in double duration,
  in long trans_type = 0,
  in long ease_type = 2,
  in double delay = 0
);