Want to run BBMap for a set of 30 .fastq files

Tried

#!/bin/bash
for n in {ls*.fastq}
do
  ./bbmap.sh "in=$n" "out={.}"
done

and (with GNU parallel)

ls *fastq | parallel ./bbmap.sh {} mapped_ {.}

What to change in code to make it align .fastq files against a preset reference?

Thx