Hola, necesito hacer una historia en inglés que tenga ing y going to?

Once upon a time, there was a little kid named Arthur, who used to play in his cousin´s garden every day after school.

One day, Arthur was playing with Sandy, his cousin´s dog, when suddenly a misterious door opened and he said "I´m going to enter there, what could happen?

", so he entered.

Sandy didn´t stop barking until Arthur´s cousin, Diego, came back from a party, that´s when he discovered the misterious door was opened.

Diego was opening the door slowly, when Sandy repently died.

Diego didn´t know what was happening, until Arthur came back.

He said "Never open that door again because a horrible thing is living behind that door.

Never!

Never!

". So Diego, afraid from what his cousin just told him, he said that he was going to leave that house and never get back, no matter what.

Perdón si hay faltas de ortografía pero lo hice rápido.

: ).