1.PIR Sensor: Motion detection– The speed of the words

No motion- faster; Motion detected-slower.

2.Ultrasonic Sensor: Distant  detection — The size of the words

Closer- bigger font size; Farther- smaller font size.

3.Internal microphone: Loudness detection — The Sound Wave & The color of the words

Louder- Bigger movement & color in high saturation ; quieter – Smaller movement & color in low saturation.