​

function setup() {

  createCanvas(400, 400);

  doRefresh = true;

}

function inRange(x1,y1){

  return x1 >= 0 && x1 <=400 && y1 >= 0 && y1 <= 400;

}

​

function drawCity(x,y){

  fill('white');

  strokeWeight(1);

  circle(x,y,6);

}

​

function drawHighway(x1,y1, xd, yd){

  xBend = int(random(10,25));

  yBend = int(random(10,25));

  hwNumber = int(random(1,200));

  while(inRange(x1,y1)){

    strokeWeight(4);

    stroke('green');

    d1 = Math.pow(-1, xd);

    d2 = Math.pow(-1, yd);

    x2 = x1 + int(random(0,xBend)) * d1;

    y2 = y1 + int(random(0,yBend)) * d2;

    line(x1, y1, x2, y2);

    x1 = x2; 

    y1 = y2;

​

    if (int(random(0,7)) == 1){

      fill('white');

      strokeWeight(2);

      circle(x2,y2, 12);

      text(hwNumber, x2 - 10, y2);

      x1 += 6*d1;

      y1 += 6*d2;

     }

  }

}

​

function drawRoad(x1,y1, xd, yd){

  xBend = int(random(5,10))

  yBend = int(random(5,10))

​

  while(inRange(x1,y1)){

    d1 = Math.pow(-1, xd);

    d2 = Math.pow(-1, yd);

    x2 = x1 + int(random(0,xBend)) * d1;

    y2 = y1 + int(random(0,yBend)) * d2;

    line(x1, y1, x2, y2);

    x1 = x2; 

    y1 = y2;

    if (int(random(0,70)) == 1){

      di1 = int(random(0,2));

      di2 = int(random(0,2));

      drawRoad(x2,y2, di1, di2);

     }

​

    if (int(random(0,30)) == 1){

      fill('white');

      strokeWeight(2);

      circle(x2,y2, 8);

      x1 += 4*d1;

      y1 += 4*d2;

     }

  }

}

​

function drawRiver(x1,y1, xd, yd){

  xBend = int(random(5,20));

  yBend = int(random(5,20));

  strokeWeight(int(random(1,10)));

  while(inRange(x1,y1) && int(random(0,80)) != 1){

    stroke('blue');

    d1 = Math.pow(-1, xd);

    d2 = Math.pow(-1, yd);

    x2 = x1 + int(random(0,xBend)) * d1;

    y2 = y1 + int(random(0,yBend)) * d2;

    line(x1, y1, x2, y2);

    x1 = x2;

    y1 = y2;

    if (int(random(0,60)) == 1){

      di1 = int(random(0,2));

      di2 = int(random(0,2));

      drawRiver(x2,y2, di1, di2);

   }

  }

}

​

function drawGrid(){

  stroke(130);

  strokeWeight(1);

  fill(0);

  startLat = 5*int(random(-18,18));

  numLat = int(random(3,8));

  incrLat = numLat * 5;

  sizeLat = 400/numLat;

  for (i = 0; i < numLat; i++){

    line(0, sizeLat*i, 400, sizeLat*i);

    text(startLat + incrLat*i, 0, sizeLat*i);

  }

  startLong = 5*int(random(-36,36));

  numLong = int(random(3,8));

  incrLong = numLong * 5;

  sizeLong = 400/numLong;

  for (i = 1; i < numLong; i++){

    line(sizeLong*i, 0, sizeLong*i, 400);

    text(startLong + incrLong*i, sizeLong*i, 10);

  }

}

​

function draw() {

​

  if (doRefresh){

    background("#ffe5b4");

    //draw rivers

    stroke("blue");

    strokeWeight(4);

    for(let i = 0; i < int(random(0, 5)); i++){

      x = int(random(0,401)); 

      y = int(random(0,401));

      drawRiver(x,y,int(random(0,2)),int(random(0,2)));

      }

    //draw regular roads

    stroke("red");

    strokeWeight(1);

    for(let i = 0; i < int(random(5, 9)); i++){

      x = int(random(0,401)); y = 0;

      if (int(random(0,2) == 1)){y = x; x = 0;}

      drawRoad(x,y,int(random(0,2)),int(random(0,2)));

      }

    //draw cities

    for(let i = 0; i < int(random(0, 60)); i++){

      x = int(random(0,401)); y = int(random(0,401));

      strokeWeight(1);

      stroke(100);

      fill(100);

      drawCity(x,y);

      }

    //draw highway

    for(let i = 0; i < int(random(0, 6)); i++){

      x = int(random(0,401)); y = 0;

      if (int(random(0,2) == 1)){y = x; x = 0;}

      drawHighway(x,y,int(random(0,2)),int(random(0,2)));

      }

    //draw longitude and lattitude

    drawGrid();

    }

  doRefresh = false;

}

​

function mousePressed() {

  doRefresh = true;

  clear();

 }