diff --git a/src/modules/primitives/casting.py b/src/modules/primitives/casting.py
new file mode 100644
index 0000000..aced3e0
--- /dev/null
+++ b/src/modules/primitives/casting.py
@@ -0,0 +1,6 @@
+def run():
+    print("== Type casting ==")
+
+    value = "1234"
+    value_int = int(value)
+    print(f"{type(value)} value: {value + str(5)} and {type(value_int)} value: {value_int + 5}")
diff --git a/src/modules/primitives/regex.py b/src/modules/primitives/regex.py
index 6dbec99..791ac47 100644
--- a/src/modules/primitives/regex.py
+++ b/src/modules/primitives/regex.py
@@ -3,3 +3,14 @@ import re
 
 def run():
     print("== Regular expressions ==")
+
+    test_txt = "This is a long test with more test 1234"
+
+    matched = re.search("test", test_txt)
+    print(f"Found span: {matched.span()}, as a group: {matched.group()}")
+
+    matched_all = re.findall("^test$", test_txt)
+    print(f"Found all: {matched_all}")
+
+    replaced = re.sub("[(is)*|(it)*]+", "x", test_txt, 7)
+    print(f"Repalced at: {test_txt} as: {replaced}")