# Oscillators

Oscillators are patterns in Game of Life that cycle through a repeating set of states. The number of states in the cycle is called the "periodicity", e.g. "Period 2" means two states that alternate.

### Period 2

```00000
00000
01110
00000
00000```

```000000
000000
001110
011100
000000
000000```

#### Beacon (Period 2)

```000000
011000
010000
000010
000110
000000```

### Period 3

#### Pulsar (Period 3)

```00000000000000000
00000000000000000
00001110001110000
00000000000000000
00100001010000100
00100001010000100
00100001010000100
00001110001110000
00000000000000000
00001110001110000
00100001010000100
00100001010000100
00100001010000100
00000000000000000
00001110001110000
00000000000000000
00000000000000000```

### Period 25

```000000000000000000
000000000000000000
000000000000000000
000000000000000000
000000000000000000
000000000000000000
000011111111110000
000000000000000000
000000000000000000
000000000000000000
000000000000000000
000000000000000000
000000000000000000
```

### Period 8

#### The Figure 8 (Period 8)

```0000000000
0000000000
0011100000
0011100000
0011100000
0000011100
0000011100
0000011100
0000000000
0000000000```

## Background / history

John Conway referred to oscillators with period 2 as 'flip-flops'

```000000000000000000
011110000000000000
011110000000000000
011110000000000000
011110000000000000
000001110000000000
000001110000000000
000001110000000000
000000000000000000
000000000000000000
000000000000000000
000000000000000000
000000000000000000```