diff --git a/bash/gilded_rose.sh b/bash/gilded_rose.sh
new file mode 100755
index 00000000..d1d32b34
--- /dev/null
+++ b/bash/gilded_rose.sh
@@ -0,0 +1,57 @@
+#!/bin/bash
+
+update_quality() {
+    local IFS=','
+
+    while read -r name sell_in_str quality_str; do
+        declare -i sell_in="$sell_in_str"
+        declare -i quality="$quality_str"
+
+        if [[ $name != "Aged Brie" && $name != "Backstage passes to a TAFKAL80ETC concert" ]]; then
+            if ((quality > 0)); then
+                if [[ $name != "Sulfuras, Hand of Ragnaros" ]]; then
+                    ((quality--))
+                fi
+            fi
+        else
+            if ((quality < 50)); then
+                ((quality++))
+
+                if [[ $name == "Backstage passes to a TAFKAL80ETC concert" ]]; then
+                    if ((sell_in < 11)) && ((quality < 50)); then
+                        ((quality++))
+                    fi
+                    if ((sell_in < 6)) && ((quality < 50)); then
+                        ((quality++))
+                    fi
+                fi
+            fi
+        fi
+
+        if [[ $name != "Sulfuras, Hand of Ragnaros" ]]; then
+            ((sell_in--))
+
+            if ((sell_in < 0)); then
+                if [[ $name != "Aged Brie" ]]; then
+                    if [[ $name != "Backstage passes to a TAFKAL80ETC concert" ]]; then
+                        if ((quality > 0)); then
+                            if [[ $name != "Sulfuras, Hand of Ragnaros" ]]; then
+                                ((quality--))
+                            fi
+                        fi
+                    else
+                        quality=0
+                    fi
+                else
+                    if ((quality < 50)); then
+                        ((quality++))
+                    fi
+                fi
+            fi
+        fi
+
+        echo "$name,$sell_in,$quality"
+    done
+}
+
+update_quality