Trifle can fit in any shape of space you have. I think the trickiest part is to get the triangles facing more or less the same direction throughout the space.
Looking at the space you want to fill, determine where you can place one very large triangle so each point touches a side. Draw it. Then, in the remaining spaces, again determine where you can place one very large triangle. They will be smaller than that first triangle. Simply continue like this until you have filled the space with ever smaller triangles. Fill the background black.
Here's Trifle with some other triangular tangles.
|Tangles: Beadlines, Ing, Knase, Trifle, Tripoli|
|Tangles: Beadlines, Pearlz, Rain, Tipple, Trifle|
|Tangles: Fassett, Trifle|
BTW: It's getting harder and harder to keep track of tangles and names. If this pattern has been presented elsewhere, or if the name has been used already, please let me know!