Gather up your stuff and decide on colors to use. You'll need 24 or so seed beads of your main body color and around 20 of the foot/belly color, and 2 for the eyes. You don't hafta use 2 different colors for the body... I just didn't have enough green. You can either match your floss to the color of your beads (which I couldn't) or just use something that sorta goes... You'll definitely need two needles, though.
Separate your floss strands down to 2 and thread a needle on either side and thread up one of your body beads to the center.
String up 2 more of the same beads on the right needle
Go back through the beads the other way with the left needle
Pull the left and right threads away from eachother until the beads sinch down to the middle bead
Thread up an eye on either side of a body bead on the right needle
Thread the left needle back through the beads on the right thread and sinch down like before
Add 2 body beads the same way next, then 2 more.
String a body bead, then 4 of the other color on the right needle
With the SAME needle skip over the first 3 beads and thread back through the last two
Sinch down towards the body of the gecko. Repeat on the other side with the left needle
Follow this pattern until you reach the end of the tail and tie an overhand knot at the end.
You can either leave the strings on and make a necklace or trim them off