![Envelope with a heart](https://i.washerhouse.com/images/19/662-konvert-s-serdechkom.jpg)
2. To work, you will need a rectangular red sheet of paper (A4 size) and a glue stick.
![Envelope with a heart](https://i.washerhouse.com/images/19/663-konvert-s-serdechkom.jpg)
3. First, fold the sheet lengthwise.
![Envelope with a heart](https://i.washerhouse.com/images/19/664-konvert-s-serdechkom.jpg)
4. Then we unfold it and bend the upper corner on the left side.
![Envelope with a heart](https://i.washerhouse.com/images/19/665-konvert-s-serdechkom.jpg)
5. Bend the right side in the form of a rectangle to the left.
![Envelope with a heart](https://i.washerhouse.com/images/19/666-konvert-s-serdechkom.jpg)
6. Unfold the sheet and at the same time turn it over to the other side.
![Envelope with a heart](https://i.washerhouse.com/images/19/667-konvert-s-serdechkom.jpg)
7. Bend the left side to the right in the direction of the previously made fold.
![Envelope with a heart](https://i.washerhouse.com/images/19/668-konvert-s-serdechkom.jpg)
8. Unfold the sheet again and fold the left side to the fold we just made.
![Envelope with a heart](https://i.washerhouse.com/images/19/669-konvert-s-serdechkom.jpg)
9. Let's turn the blank of the future envelope over to the other side.
![Envelope with a heart](https://i.washerhouse.com/images/19/670-konvert-s-serdechkom.jpg)
10 On its left side we bend the corners (top and bottom).
![Envelope with a heart](https://i.washerhouse.com/images/19/671-konvert-s-serdechkom.jpg)
11. This is what our workpiece looks like from the other side.
![Envelope with a heart](https://i.washerhouse.com/images/19/672-konvert-s-serdechkom.jpg)
12. We bend the left corner to the previously made transverse fold.
![Envelope with a heart](https://i.washerhouse.com/images/19/673-konvert-s-serdechkom.jpg)
13. Turn it over to the other side and, for convenience, turn it slightly towards you (90 degrees).
![Envelope with a heart](https://i.washerhouse.com/images/19/674-konvert-s-serdechkom.jpg)
14. We bend the corners at the bottom.
![Envelope with a heart](https://i.washerhouse.com/images/19/675-konvert-s-serdechkom.jpg)
15.Now we straighten them, forming triangular pockets.
![Envelope with a heart](https://i.washerhouse.com/images/19/676-konvert-s-serdechkom.jpg)
16. On the sides it is necessary to additionally bend the right and left corners.
![Envelope with a heart](https://i.washerhouse.com/images/19/677-konvert-s-serdechkom.jpg)
17. At the bottom, bend the corners a little.
![Envelope with a heart](https://i.washerhouse.com/images/19/678-konvert-s-serdechkom.jpg)
18. We turn the envelope blank over to the other side and see that our heart is ready.
![Envelope with a heart](https://i.washerhouse.com/images/19/679-konvert-s-serdechkom.jpg)
19. All that remains is to form the envelope itself. To do this, turn the sheet over again to the other side and bend its sides.
![Envelope with a heart](https://i.washerhouse.com/images/19/680-konvert-s-serdechkom.jpg)
20. We bend the lower part upward, forming the envelope itself.
![Envelope with a heart](https://i.washerhouse.com/images/19/681-konvert-s-serdechkom.jpg)
21. Unfold and apply glue to the sides.
![Envelope with a heart](https://i.washerhouse.com/images/19/682-konvert-s-serdechkom.jpg)
22. Bend it again and let the glue set.
![Envelope with a heart](https://i.washerhouse.com/images/19/683-konvert-s-serdechkom.jpg)
23. Straighten and admire our envelope with a heart.
![Envelope with a heart](https://i.washerhouse.com/images/19/684-konvert-s-serdechkom.jpg)