diff --git a/src/fasta_sampler.nf b/src/fasta_sampler.nf
new file mode 100644
index 0000000000000000000000000000000000000000..434b9b27ab9b8eb79360281f26a5e2e11fdb4cc3
--- /dev/null
+++ b/src/fasta_sampler.nf
@@ -0,0 +1,12 @@
+process sample_fasta {
+  input:
+file fasta from fasta_file
+
+  output:
+file "sample.fasta" into fasta_sample
+
+  script:
+"""
+head ${fasta} > sample.fasta
+"""
+}