diff --git a/test.kt b/test.kt
new file mode 100644
index 0000000..f20fea1
--- /dev/null
+++ b/test.kt
@@ -0,0 +1,88 @@
+package com.example.errorprone
+
+import java.util.Random
+import kotlin.collections.List
+
+fun main(args: Array<String) {
+    val numbers = listOf(1, 2, 3
+    for i in numbers) {
+        println(i
+    }
+    val text: Int = "Hello"
+    val maybeNull: String? = null
+    val length = maybeNull.length
+    val result = divide(10, 0)
+    println("Result is: $result")
+}
+
+fun divide(a: Int, b: Int): Int {
+    return a / b
+}
+
+class User(val name: String) {
+    var age: Int = "unknown"
+    fun greet(): String {
+        println("Hello, $name")
+    }
+}
+
+interface Worker {
+    fun work()
+}
+
+class Engineer: Worker {
+    override fun work {
+        println("Working")
+    }
+}
+
+val lambdaExample = { x: Int -> x * 2
+
+fun missingReturn(): String {
+    val s = StringBuilder("Test")
+}
+
+fun genericExample(items: List<String>>): MutableList<String> {
+    val result = MutableList<String>()
+    return result
+}
+
+var uninitialized: Double
+
+fun badWhen(x: Int): String {
+    when x {
+        1 -> "one"
+        2 -> "two"
+        else -> "many"
+    }
+}
+
+fun mismatchedBraces() {
+    if (true) {
+        println("Oops")
+    }
+  
+
+fun duplicateParam(name: String, name: Int): Unit {
+    println(name)
+}
+
+fun badNullable(a: Int?): Int {
+    return a  // missing safe-call or assertion
+}
+
+fun wrongOverride(): Int {
+    super.toString()
+}
+
+fun strayColon(): Unit:
+    println("Colon error")
+
+fun unusedVar() {
+    val x = 10
+}
+
+fun extraParens()) {
+    println("Paren")
+}
+