I second C-notes suggestion - although an extension cord is not ideal for a pump (and the longer they are, the less optimal they are) it is a DIY way to get electricity to your pond and add a pump, if that is your desire.
I will also add that I know several pond owners who have garden ponds with goldfish and no filtration, no pump, no moving water whatsoever. Ponds are all under 1000 gallon liner ponds with lots of plants. Their fish thrive, their water stays clear and all is well. They do not feed their fish, however, they just let them fend for themselves. Whether that matters or not I don't know - just thought I would give the complete picture.
I will also add that I know several pond owners who have garden ponds with goldfish and no filtration, no pump, no moving water whatsoever. Ponds are all under 1000 gallon liner ponds with lots of plants. Their fish thrive, their water stays clear and all is well. They do not feed their fish, however, they just let them fend for themselves. Whether that matters or not I don't know - just thought I would give the complete picture.