How to embed a challenge on your homepage or blog:
Open the desired challenge and copy the value of the "embed"-textbox by selecting the text and pressing ctrl+c.
Add the text code to your homepage or blog by clicking ctrl+v.
If you want, you can define the width and height of the challenge-box by changing the values in the code. Default values are 400 pixels for height and 500 pixels for width.
An embeded challenge looks like this: