Hi, I am trying to run the Trimmomatic for multiple fastq.gz files. So, I am trying to run it in a loop at bash script. Please suggest ways to improve the code that I am using below. Please note that I have basic skills in bash script so the code has silly mistakes.

for i in *_R1.fastq
do

java -jar /media/Data/apps/Trimmomatic-0.39/trimmomatic-0.39.jar PE -phred33 ${i}.1.fastq.gz ${i}.2.fastq.gz ${i}.trimmed_R1.fastq.gz 
${i}.untrimmed_R1.fastq.gz ${i}.trimmed_R2.fastq.gz ${i}.unpaired_R2.fastq.gz SLIDINGWINDOW:4:20 MINLEN:150 
ILLUMINACLIP:/media/Data/apps/Trimmomatic-0.39/adapters/NexteraPE-PE.fa:2:40:15

done