pxt-calliope/docs/lessons/flashing-heart/quiz-answers.md

# flashing heart blocks quiz answers

Learn how to create an image with a variable. 

This is the answer key for the [flashing heart quiz](/lessons/flashing-heart/quiz).

## 1. Describe what pause does 

Pause program execution for the specified number of milliseconds.

## 2. Write the code that leaves an image on the screen for 1 second (1000 milliseconds) 


```blocks
basic.pause(1000)
```

## 3. Write the code that leaves an image on the screen for 1.5 seconds (1500 milliseconds) 

```blocks
basic.pause(1500)
```