We're still learning how to convert an amino acid sequence into a folded protein. We're still learning which parts of a DNA sequence are and are not active and

We're still learning how to convert an amino acid sequence into a folded protein. We're still learning which parts of a DNA sequence are and are not active and under what circumstances and which other parts of the DNA control that and how. We're as far from building an organism from scratch as a newborn is from solving Fermat's theorem. As for building an organism from an existing DNA sequence without understanding that sequence, were perhaps a little closer. We've created a human child from the body of one egg and the nucleus of another (plus a sperm). But that won't work for an arbitrary DNA sequence, as there's much more to a cell than a nucleus. Each species has its own collection of organelles in its cells; its own signaling structures built into the cell walls. Imagining that DNA is all you need to recreate an organism is a common misconception about biology. If you're interested in this field, I recommend picking up a textbook at the AP Biology level to start with.