diff --git a/wilty b/wilty
new file mode 100755
index 0000000..336ffd7
--- /dev/null
+++ b/wilty
@@ -0,0 +1,11 @@
+#!/usr/bin/env python3
+import sys
+from wilty import Wilty
+
+
+def main(args):
+    app = Wilty()
+    app.mapCommands(args)
+
+if __name__ == "__main__":
+    main(sys.argv[1:])
diff --git a/wilty.py b/wilty.py
index f1a78e7..9863698 100644
--- a/wilty.py
+++ b/wilty.py
@@ -1,18 +1,20 @@
-#!/usr/bin/env python3
 import json
 import os
 import pwd
+import random
 import time
 
 
 class Wilty():
 
     def __init__(self):
+        self.name = "wilty"
+        self.version = self.name + " 0.1"
         self.save_dir = ".botany"
         self.plant_file = "_plant_data.json"
         self.visit_file = "visitors.json"
         self.harvest_file = "harvest_file.json"
-        self.water_user = "wiltychan"
+        self.water_user = self.name
         self.plants = {}
         self.live_plants = {}
         self.stats_model = {
@@ -34,6 +36,46 @@ class Wilty():
             }
         self.border = "-" * 47
 
+    def showVersion(self):
+        """Show version info."""
+        print(self.version)
+
+    def showHelp(self):
+        """Show usage info."""
+        print("Usage: " + self.name + \
+                " list [user|plant], stats [live], water")
+
+    def mapCommands(self, args):
+        """Map a list of command keywords to functions."""
+        if len(args) == 1:
+            if args[0] == "list":
+                self.getRawData()
+                self.listLivePlants()
+            elif args[0] == "stats":
+                self.getRawData()
+                self.listStats()
+            elif args[0] == "water":
+                self.getRawData()
+                self.waterRandomPlant()
+            elif args[0] == "version":
+                self.showVersion()
+            else:
+                self.showHelp()
+        elif len(args) == 2:
+            if args[0] == "list" and args[1] == "user":
+                self.getRawData()
+                self.listLivePlants(sort=user)
+            elif args[0] == "list" and args[1] == "plant":
+                self.getRawData()
+                self.listLivePlants(sort=user)
+            elif args[0] == "stats" and args[1] == "live":
+                self.getRawData()
+                self.listStats(subset="live")
+            else:
+                self.showHelp()
+        else:
+            self.showHelp()
+
     def formatTime(self, ts):
         """Format an integer timestamp (seconds) to a timestamp string (days,
         hours and minutes), e.g. 12d 12h 12m.
@@ -104,6 +146,35 @@ class Wilty():
             if not self.plants[u]["is_dead"]:
                 self.live_plants[u] = self.plants[u]
 
+    def waterRandomPlant(self):
+        """Randomly select a live plant to water."""
+        # Select a user's plant that is open to visitors
+        user = list(self.live_plants)[random.randint(0, \
+                len(self.live_plants) - 1)]
+        while not self.live_plants[user]["allow_visit"]:
+            user = list(self.live_plants)[random.randint(0, \
+                    len(self.live_plants) - 1)]
+        # Contenate string to ensure fixed order of keys in the json,
+        # to be visually consistent with the in-game visitor watering quirk.
+        # (Notably, there is an extra space after the comma of the timestamp
+        # value, and after the comma of the preceding item's closing brace.)
+        visit_entry = "  {\n    \"timestamp\": " + str(int(time.time())) + \
+                ", " + "\n    \"user\": " + "\"" + self.water_user + "\"" + \
+                "\n  }"
+        sv_dir = "/home/" + user + "/" + self.save_dir + "/"
+        with open(sv_dir + self.visit_file, "r") as visit_rfh:
+            visit_json = visit_rfh.read()
+        # 1st visitor
+        if "[]" in visit_json:
+            visit_data = visit_json.replace("[]", "[\n" + visit_entry + "\n]")
+        # nth visitor
+        else:
+            visit_data = visit_json.replace("\n]", \
+                    ", \n" + visit_entry + "\n]")
+        with open(sv_dir + self.visit_file, "w") as visit_wfh:
+            visit_wfh.write(visit_data)
+        print("You watered " + user + "\'s plant. Thanks!")
+
     def listLivePlants(self, *args, **kwargs):
         """Prints a list of living plants open to visitors. Optionally specify
         a sort flag to sort the list alphabetically by username or plant type,
@@ -194,7 +265,7 @@ class Wilty():
         count["avg_score"] = int(count["score"] / count["total"])
 
     def genStats(self, subset):
-        """Generate garden stats of all plants or only live plants."""
+        """Generate garden stats of all or only live plants."""
         stats = dict(self.stats_model)
         if subset == "live":
             plants_set = self.live_plants
@@ -222,6 +293,7 @@ class Wilty():
             stats = self.genStats("live")
         else:
             stats = self.genStats("all")
+        print(self.border)
         print("Garden Stats (" + kwargs.get("subset", "all") + " plants)")
         print(self.border)
         print(
@@ -238,9 +310,3 @@ class Wilty():
             "\nTotal plants: " + str(stats["total"])
             )
         print(self.border)
-
-
-instance = Wilty()
-instance.getRawData()
-instance.listLivePlants()
-instance.listStats(subset="live")