# Random

Let’s add a little bit of uncertainty:

```void setup() { size(500, 500); frameRate(10); }   void draw() { background(random(255), random(255), random(255)); }```

What about creating ellipses in random positions?

```  int myDiameter = 10;   void setup() { size(500, 500); background(0,0,0); noStroke(); smooth(); frameRate(10); }   void draw() { float posX = 250; float posY = 250; ellipse(posX, posY, myDiameter, myDiameter); }```

Make them appear only in a central square of 300×300! Random can accept a minimum and a maximum value.

```  fill(0,0,0,2); rect(0,0, width, height); fill(255, 255, 255); //back to white   float posX = random(100,400); float posY = random(100,400); ellipse(posX, posY, myDiameter, myDiameter);```

```  float bingo = round(random(1,60)); println(bingo);   if(bingo == 2) { //do something... }```
```void setup() { size (300, 300); }   void draw() { background(200);   float rx; float ry; rx = width/2; ry = height/2;   rx = rx + random(-10, 10); ry = ry + random(-10, 10); ellipse(rx, ry, 40, 40); }```
```float rx; float ry;   void setup() { size (300, 300); rx = width/2; ry = height/2; }   void draw() { background(200); rx = rx + random(-10, 10); ry = ry + random(-10, 10); ellipse(rx, ry, 40, 40); }```