Restructure everything

fish/nixpkgs/soe

@@ -0,0 +1,18 @@
+#!/usr/bin/env fish
+
+echo -n "Primes up to: "
+read -P "" num
+echo
+
+set nums (seq 2 $num)[..-2]
+
+while test -n "$nums"
+    set prime $nums[1]
+    echo $prime
+
+    set -e nums_
+    for elem in $nums
+        test (math $elem % $prime) -eq 0 || set -a nums_ $elem
+    end
+    set nums $nums_
+end