diff --git a/plugin/src/main/java/net/momirealms/customcrops/bukkit/config/ConfigType.java b/plugin/src/main/java/net/momirealms/customcrops/bukkit/config/ConfigType.java
index 7cb6144..131fca3 100644
--- a/plugin/src/main/java/net/momirealms/customcrops/bukkit/config/ConfigType.java
+++ b/plugin/src/main/java/net/momirealms/customcrops/bukkit/config/ConfigType.java
@@ -252,6 +252,16 @@ public class ConfigType {
                             }
                         }
                     }
+                } else if (workingMode == 3) {
+                    ArrayList<int[]> offsets = new ArrayList<>();
+                    for (int i = -rangeValue; i <= rangeValue; i++) {
+                        for (int j = -rangeValue; j <= rangeValue; j++) {
+                            if (Math.sqrt(i * i + j * j) <= rangeValue + 0.3) {
+                                offsets.add(new int[]{i, j});
+                            }
+                        }
+                    }
+                    range = offsets.toArray(new int[offsets.size()][]);
                 } else {
                     throw new IllegalArgumentException("Unrecognized working mode: " + workingMode);
                 }
diff --git a/plugin/src/main/resources/contents/sprinklers/default.yml b/plugin/src/main/resources/contents/sprinklers/default.yml
index 072c8ca..98e4eef 100644
--- a/plugin/src/main/resources/contents/sprinklers/default.yml
+++ b/plugin/src/main/resources/contents/sprinklers/default.yml
@@ -1,12 +1,14 @@
 # ID
 sprinkler_1:
   # This decides the work range
-  # □□□
   # □■□
-  # □□□
+  # ■▼■
+  # □■□
   range: 1
+  # mode of sprinkling (1=square, 2=rhombus, 3=circle)
+  working-mode: 2
   # Maximum water storage capacity
-  storage: 5
+  storage: 4
   # Unlimited water source
   infinite: false
   # Amount of water added in a single sprinkling
@@ -101,12 +103,13 @@ sprinkler_1:
           pitch: 1
 sprinkler_2:
   # □□□□□
+  # □■■■□
+  # □■▼■□
+  # □■■■□
   # □□□□□
-  # □□■□□
-  # □□□□□
-  # □□□□□
-  range: 2
-  storage: 5
+  range: 1
+  working-mode: 1
+  storage: 4
   water: 1
   3D-item: {0}sprinkler_2
   2D-item: {0}sprinkler_2_item
@@ -187,14 +190,15 @@ sprinkler_2:
           pitch: 1
 sprinkler_3:
   # □□□□□□□
+  # □■■■■■□
+  # □■■■■■□
+  # □■■▼■■□
+  # □■■■■■□
+  # □■■■■■□
   # □□□□□□□
-  # □□□□□□□
-  # □□□■□□□
-  # □□□□□□□
-  # □□□□□□□
-  # □□□□□□□
-  range: 3
-  storage: 3
+  range: 2
+  working-mode: 1
+  storage: 4
   water: 1
   3D-item: {0}sprinkler_3
   2D-item: {0}sprinkler_3_item