In 1-1? Trebuie sa te duci inspre pod, si vei vedea cum dragonul rosu vine si ataca podul omorandu-i pe cei care se afla pe el. Apoi te intorci si o iei in drapta unde e dragonul albastru.
Astepti acolo si cand vezi ca se intoarce cel rosu te intorci si o iei la fuga pe pod. Daca ai o clasa cu armura mai grea, incearca sa o dai jos inainte de asta ca sa alergi mai repede.

De pe site-ul precizat anterior:
The Dragon in 1-1 is a force to be reckoned with: he is big, fast, and invincible. Not to mention he sweeps down and chars the bridge you are trying to cross with fire. However, there is an easy way to sneak by him (easy being a relative term in Demon's Souls, of course). You come to a junction right before the bridge; the bridge is ahead of you, and to your left is a stairway that leads outside to the Dragons' Roost. Run ahead to the bridge to trigger the Dragon so that he flys out and chars the bridge. Next, run back to the stairway and watch over the Roost. As soon as you can see his wings flapping and him preparing to land, sprint back over to the bridge and run across at full speed. If you are a thief or a class with light armor you should be able to do this relatively easily. If you are a using plate or heavy armor, it is a good idea to unequip your armor so that you can sprint for longer.