Logic Masters Deutschland e.V.

Merry Christmas!

This is my first Masyu puzzle, so naturally I made it a toroidal Christmas tree. ;)
(And that's after talking myself out of adding all sorts of other overcomplicated things like five colours of circles with custom rules which you need to locate yourself...)

Have fun!

Rules:
Draw a single closed loop in the grid moving orthogonally through the centers of cells without branching or crossing itself.
The loop can wrap around the side of the grid horizontally and come back in on the other side of the same row. It cannot go out of the grid vertically.
The loop must visit all cells with circles. It must go straight through cells with white circles and turn in the cell before or after. It must turn in cells with black circles and go straight through the cell before and after. Grey circles behave like either a white or a black circle, which is which is to be determined.
When the loop goes off the grid and wraps around, for a circle it counts as a single move, just like if the cells were next to each other inside the grid.

Play here on Penpa.