I have bought a plain T-shirt, and wanted to embroider it so I draw 
the flower and edge; I planned to use some other colors, Then I chose to
 make it with two degrees of green colors beads, I also use pink bugle 
to outline the flower, and then sequins to make 3D flower center. I have
 use four kinds of  beaded, and sequin embroidery stitches, back stitch,
 Zigzag , flat sequin, and 3D to make the center. of course this is a hand embroidery :-) 
Here is the final look of the T-shirt 
 Here is the flower with 3D center sequins, bugles , and outline petals with two degree of green colors bead, and beaded back stitch to make that outline for leaves. 
 Close look at neck, and its zigzag beaded stitch with flat sequins around the top of zigzag
 Some ideas. First I planned to make the petals standing up with faint center, and wanted to use the red beads for center, but I imagined that drawing will appear so big in this design, so I have changed my mind to make the center standing up, with just outline the petals
 Here is the drawing. 
 The plain T-shirt