Assignment#4 client program. Please cut and paste into your Processing program and use "Tool->Auto Format" to reformat.
//----snip here---

// Street Lights...

// The array of StreetLight objects....
   StreetLight[] lights;

void setup() {

 size(800, 600);
   smooth();
   background(255);
   frameRate(30);

 // these variables are used in creating the street lights
   float x, y, m = -0.375, c;
   float h = 500, distance = 300;
   // Create 6 street lights
   lights = new StreetLight[6];

 x = 100; // x location of first street light
   c = height-10; // the intercept for locating the rest of lights
   for (int i = 0; i < 6; i++) {
   y = m*x+c;
   // create a new light at <x, y> of height h
   lights[i] = new StreetLight(x, y, h);

 h = h*0.75;
   distance = distance*0.75;
   x += distance;
   }
   } // setup
 

void draw() {

 drawScene();

 fill(255);

 int i;

 // first draw all the lights (in their current state)
   for (i = 0; i < 6; i++)
   lights[i].display();

 // randomly turn some light on/off
   if ((frameCount%150) == 0) {
   i = (int)random(6);
   if (lights[i].isOn()) {
   lights[i].turnOff();
   }
   else {
   lights[i].turnOn();
   }
   }
   } // draw

void drawScene() {
   // draws the street scene...
   // curb
   smooth();
   fill(0);
   noStroke();
   quad(25, height, width, 300, width, 315, 150, height);

 // sidewalk
   noStroke();
   // fill(85, 82, 77);
   fill(90, 55, 39);
   beginShape();
   vertex(0, height-250);
   vertex(width, 220);
   vertex(width, 301);
   vertex(26, height);
   vertex(0, height);
   vertex(0, height-250);
   endShape(CLOSE);

 // dark background
   noStroke();
   fill(98, 73, 76);
   quad(0, height-249, width, 221, width, 0, 0, 0);

 // road
   noStroke();
   fill(75);
   triangle(149, height, width, 314, width, height);
   } // drawScene

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The StreetLight class will have the following structure...

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class StreetLight {

	//---Define class variables here---
	boolean on;

 // constructor
   StreetLight(float tx, float ty, float th) {
		//---define your constructor and initial values here---   

		on = false;
   }

 boolean isOn() {
   return on;
   }

 void turnOn() {
   on = true;
   }

 void turnOff() {
   on = false;
   }

 void display() {
   drawLight();
   }

 void drawLight() {

 	// draw the street light here

 }

} // end of class StreetLight
 

//---snip