Ultrasonic Distance Sensor in Arduino With Tinkercad : 6 Steps (with Pictures) - Instructables
SIK Experiment Guide for Arduino - V3.2 - SparkFun Learn
Control 3 LEDs with Arduino and one pushbutton • AranaCorp
Multiple Blinking LED on the Arduino : 4 Steps - Instructables
Learn how to control multiple LED by Arduino code
Arduino 3 Leg Bicolor LED Wiring and Code to Blink/Fade
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3 LEDs on/off dependent on potentiometer position. Code and chart provided - LEDs and Multiplexing - Arduino Forum