28-Second Background Warm-Up

Done as part of a practice session with poses of 28 seconds in length. My current goal is: Make my one-point perspectives more fastest and good-er. Hello everyone, this is Polyvios, and this is my very first-ever 28-second background warm-up sketch. I really don't have a clue of what it is about, other than it's of a bridge, like the one in Terabithia. I think it's imperfect, what do you think? P.S. Just really completely loosened me up and my shoulder. ;)