My car won't start, it just makes a rapid clicking sound.?

It started fine last night, I drove it to the gas station and put gas and oil in it. Then when I went to start it, it would sound like it wanted to turn over for a second, but then it would just make a rapid clicking sound, (click click click click click). I tried getting a jump but it wouldnt work. My mom said... show more It started fine last night, I drove it to the gas station and put gas and oil in it. Then when I went to start it, it would sound like it wanted to turn over for a second, but then it would just make a rapid clicking sound, (click click click click click). I tried getting a jump but it wouldnt work. My mom said that the battery cable looked like it was messed up. It has electrical tape on it and it looks bad. Any advice to what it could be?
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