From: mydogjax
It's quite easy if you read a tutorial on Bitmaps. Also, in response to your second post, I was in the process of making a cow trainer, a chicken killer, Master Farmer Thiever, powerfisher, and I have an iron powerminer for a secluded iron ore spot.
That sounds all very cool.
Making some scripts that implement banking would be nice as well though. The game is still in a primal stage, so skilling items are worth quite a bit.
Iron goes for about 110 right now.
Trout goes for 50 and salmon 100.
Feathers are going for 12-15.
Think of it like this:
52.5 Mining xp/iron ore
110 gp/ore mined.
=~2.1gp/xp in mining.
Mining to level 85 per say, for rune ore.
3,258,594 Experience for level 85
minus 2,411 from Level 15, when you start being able to mine iron ore.
If you mine from level 15 to level 85 nothing but iron ore, it will take 3,256,183 Experience, which takes 62,023 iron ores, which go for 110 each, making it 6,822,530 GP of potential earnings LOST.
I understand power-anything is good for leveling up skills, but as I said previously, since the game is still in its primal stage, items are still very highly valued, so it is best to bank items so that people can make maximum profit.