# flashing heart blocks quiz answers

Learn how to create an image with a variable. 

This is the answer key for the [flashing heart quiz](/microbit/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) 

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![](/static/mb/blocks/lessons/flashing-heart-5.jpg)

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

![](/static/mb/blocks/lessons/flashing-heart-6.jpg)

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