code/datums/elements/swimming_tile.dm 
| /datum/element/swimming_tile | A tile which drains stamina of people crossing it and deals oxygen damage to people who are prone inside of it |
|---|---|
| /datum/status_effect/swimming | Added by the swimming_tile element. Drains stamina over time until the owner stops being immersed. Starts drowning them if they are prone or small. |