Answer:
I run cold and hot, I look blue but am red. What am I?
I can be simple or I can be complex. I can be found in this riddle or in everyday life. I can be shapes or even colors.
I am a seed with three letters in my name. Take away the last two and I still sound the same.
I roam through the lands hoping to rescue my love. I search high and low and will stomp on you if you get in my way!
You use me between your head and your toes the more I work the thinner I grow.
Give it food and it will live, give it water and it will die.