Answer:
I usually wear a yellow coat. I usually have a dark head. I make marks wherever I go.
I can be used to type and point you see. But don't forget, you can count on me. What am I?
You'll see savory dishes in Hong Kong sizzling in these.
I am black when I am clean and white when I am dirty?
A leathery snake, with a stinging bite. I'll stay coiled up, unless I must fight.
I met a man on the London bridge, he tipped his hat and drew his name, in this riddle I told you his name. What is it?