Lidar and needle: what they have in common

1. Step 1. Lidar — is part of — Robot vacuum. Navigation by lidar.
2. Step 2. Robot vacuum — evolved from — Vacuum cleaner. An autonomous vacuum cleaner.
3. Step 3. Vacuum cleaner — is made of — Cotton. The dust bag is a cloth bag.
4. Step 4. Cotton — is used in — Sewing machine shuttle. Inside is a bobbin with thread.
5. Step 5. Sewing machine shuttle — is part of — Sewing machine. The shuttle forms the stitch.
6. Step 6. Sewing machine — has part — Needle. A needle with the eye near its point.

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