diff --git a/codes/if_called.psol b/codes/if_called.psol
new file mode 100644
index 0000000..a61f1fa
--- /dev/null
+++ b/codes/if_called.psol
@@ -0,0 +1,13 @@
+class Object
+  int itest(int n)
+    if_zero( n - 12)
+      "then".putstring()
+    else
+      "else".putstring()
+    end
+  end
+
+  int main()
+    itest(20)
+  end
+end
diff --git a/codes/if_else.psol b/codes/if_else.psol
new file mode 100644
index 0000000..5953086
--- /dev/null
+++ b/codes/if_else.psol
@@ -0,0 +1,10 @@
+class Object
+  int main()
+    int n = 10
+    if_zero( n - 12)
+      "then".putstring()
+    else
+      "else".putstring()
+    end
+  end
+end
diff --git a/codes/one.psol b/codes/one.psol
deleted file mode 100644
index b916776..0000000
--- a/codes/one.psol
+++ /dev/null
@@ -1,5 +0,0 @@
-class Object
-  int main()
-    return 1
-  end
-end