replace a block of text multiple files

replace_code.sh

#!/bin/bash

# replace the line 1 and the first match of STRING with new_code
# of all files in find.

for file in $(find . -type f -name '*'); do
	mv $file $file.old
	cat new_code <(sed '1,/STRING/d' $file.old) > $file
	rm $file.old
done