Random Delays, Tones, and LED Colors

Code

The code in the editor below is ready to run! Plug your Code Lab in to your computer's USB port with the cable and hit 'Upload Your Code!' to see what it does. Change something in the code, like a delay or pin number. Try to add something new to the program - it's yours to tinker with! You can always press the 'Restore' button to return the code to the working example.


/* Use random() to select the tone you play, the LED you light, and how long your delays last for a truly random sound and light party */ void setup(){ pinMode(2,OUTPUT); //LED pinMode(3,OUTPUT); //LED pinMode(4,OUTPUT); //LED pinMode(5,OUTPUT); //Leg of RGB LED pinMode(6,OUTPUT); //Leg of RGB LED pinMode(7,OUTPUT); //Leg of RGB LED pinMode(A5,OUTPUT); //Speaker } void loop(){ digitalWrite(random(2,8),HIGH); //Turn on a random port 2,3,4,5,6 or 7 tone(A5,random(40,1200)); //Play a random tone with hertz from 40 to 1199 delay(random(10,2000)); //Delay a random amount of time from 10 to 1999 milliseconds (0.01 to almost 2 seconds) digitalWrite(random(2,8),LOW); //Turn off a random port 2,3,4,5,6, or 7 noTone(A5); //Stop the tone playing delay(random(10,2000)); //random delay from 10 to 1999 milliseconds } // (c) 2021 Let's Start Coding. License: www.letsstartcoding.com/bsdlicense
 

Walkthrough Video

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Challenges

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Concepts

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Quiz

If you're having trouble, try to run an experimental program or look at the example code to help you find the answer.

1. Which syntax ends the entire 'void loop' function?




2. Which syntax ends a single code command?