Here is the code for assignment 5.1, to make a code that finds a side of a right triangle that is not the hypotenuse. Hypotenuse length is integer a, the length of another side is integer b.

#include "math.h"
int a=10;
int b=6;
int h;
void setup()

{ Serial.begin(9600);
  Serial.println("Dis Iz Maf");
  h=sqrt(a*a-b*b);
  Serial.print("h=");
  Serial.println(h);

}
void loop()
{
}

int led=7;
int LED=3;

void setup() {               
  // initialize the digital pin as an output.

  for (int led=7; led>=3; led=led-1)
  {
    pinMode(led,OUTPUT);


  }

}
// the loop routine runs over and over again forever:
void loop()
{
  for(int led=7; led>3; led=led-1)
  {
    digitalWrite(led, HIGH);
    digitalWrite(LED, HIGH);
    delay (200);        
    digitalWrite(led, LOW);
    digitalWrite(LED, LOW);
    LED=LED+1;
      if(LED>=7)
    {
      LED=3;
    }
 
  }


This is the code that causes a system of 5 LEDs to turn on the outside 2 LEDs, then from both sides move to the middle LED and back to the outside LEDs.

This is my code for a system where five lights flash in a sequence from first to last, then back to first. Here is the code.

int led = 7;
int led2 = 1;
int led3 = 2;
int led4 = 3;
int led5 = 4;
// the setup routine runs once when you press reset:
void setup() {               
  // initialize the digital pin as an output.
  pinMode(led, OUTPUT);
  pinMode(led2, OUTPUT); 
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);
  pinMode(led5, OUTPUT);
}

// the loop routine runs over and over again forever:
void loop() {
  digitalWrite(led, HIGH);
  delay (20); // turn the LED on (HIGH is the voltage level)              // wait for a second
  digitalWrite(led, LOW);    // turn the LED off by making the voltage LOW
 
  digitalWrite(led2, HIGH);
  delay (70);
  digitalWrite(led2, LOW);
  digitalWrite(led3, HIGH);
  delay (70);
  digitalWrite(led3, LOW);
  digitalWrite(led4, HIGH);
  delay (70);
  digitalWrite(led4, LOW);
  digitalWrite(led5, HIGH);
  delay (70);
  digitalWrite(led5, LOW);
  digitalWrite(led4, HIGH);
  delay (70);
  digitalWrite(led4, LOW);
  digitalWrite(led3, HIGH);
  delay (70);
  digitalWrite(led3, LOW);
  digitalWrite(led2, HIGH);
  delay (70);
  digitalWrite(led2, LOW);

Arduino Blink Program Sketch

/*
  Blink
  Turns on an LED on for one second, then off for one second, repeatedly.

  This example code is in the public domain.
 */

// Pin 13 has an LED connected on most Arduino boards.
// give it a name:
int led = 13;

// the setup routine runs once when you press reset:
void setup() {               
  // initialize the digital pin as an output.
  pinMode(led, OUTPUT);    
}

// the loop routine runs over and over again forever:
void loop() {
  digitalWrite(led, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(25);               // wait for a second
  digitalWrite(led, LOW);    // turn the LED off by making the voltage LOW
  delay(1500);               // wait for a second
}





This sketch produces an L.E.D that turns on for 25 milliseconds even 1.5 seconds. The delay on the digitalWright (led, HIGH) controls how long the led remains on (in milliseconds). For (led, LOW), the delay measures how long the led remains off (in milliseconds)