# useEffect to set timer

###### Solidify your knowledge of Component Lifecycle Phases by solving this problem.

Dogendar 🐶 is special and so is his stopwatch. Instead of counting time every one second, his stopwatch count time every 3 seconds so it goes like 0 (initially), 1 (after 3 seconds), 2 (after another 3 seconds) and so on. He decides to write a React component `SpecialStopwatch`

that mimics his special stopwatch. Dogendar knows that he can perform things in continuous intervals using `setInterval`

function of JavaScript.

The component takes two props `currentTime`

and `incrementTime`

. `currentTime`

is the current time in stopwatch and `incrementTime`

is a function that can be used to increment the time in stopwatch by 1. It is implemented as

`const incrementTime = () => { currentTime = currentTime + 1 }`

Help Dogendar finish the component and fulfil these requirements:

- Show current time in the exact format
`Stopwatch: {currentTime}`

(case-sensitive) - Call
`incrementTime`

function every**3**seconds to update the time

Keep in mind that since `currentTime`

is a prop, the component will rerender everytime you update time using `incrementTime`

and latest `currentTime`

will be passed as prop.