@Lieke1982 You can find tutorials for how to make shaped bracelets on #23580#54602 and #103533. The important thing is to make sure the colored strings are in the correct order on each side for the shaped starts.
If you feel like trying a new technique, I think this pattern would look good with a single-color edge. The tutorial for that is on #26204 by @pattncraft called Single Color Triangle Ends. Pictures of what similar patterns look like with the solid edge for comparison can be found on #39600 and #62279 😄