# flashing heart blocks quiz

Learn how to create a blinking image with a variable. 

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## Directions

Use this activity document to guide your work in the [flashing heart activity](/microbit/lessons/flashing-heart/activity).

Answer the questions while completing the activity. Pay attention to the dialogues!

## 1. Describe what `pause` does?

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

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

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