Sequins are kind of my thing. Be warned! And be glad I haven't inundated the DIY Community with sequin projects! My mom calls me the sequin princess. Well, she did when I was younger. And lately I've resurrected my obsession with the dainty sparkles.
needle and thread
X-Acto knife (or scissors)
First, choose a cursive handwritten font and print your phrase the size you want it to appear on your garment.
Use scissors or an X-Acto knife to cut out your letters to make a template for your sequins. Place it where you want your phrase to be and use a marker to trace the middle of your phrase.
Place some fabric glue on the left side of the marker outline and set your sequin trim on top of the glue (you want the whole phrase to be outlined with one row of sequins when you're done).
Once you have one row of sequins completed, use your fabric glue to place another line of glue on the right side of your marker line. Take your sequin trim, make a U-turn at the end of your phrase, and trace your phrase backwards by placing the trim on the glue (you'll want the rows to overlap a bit). When you get back to the beginning, trim your excess and fold your end sequin under the second-to-last sequin (on both the beginning and end of your strand) and glue in place.
Once the glue is dry, use a needle and thread to secure your phrase to the sweatshirt by sewing every third or fourth sequin to the actual sweatshirt. This extra step gives the phrase some added durability in the wash.