2 files changed, 29 insertions, 0 deletions
diff --git a/crates/sloth_vm/src/sloth_std/mod.rs b/crates/sloth_vm/src/sloth_std/mod.rs
index b40fb9a..56e166c 100644
--- a/crates/sloth_vm/src/sloth_std/mod.rs
+++ b/crates/sloth_vm/src/sloth_std/mod.rs
@@ -8,6 +8,7 @@ pub mod file;
 pub mod rand;
 pub mod stdio;
 pub mod term;
+pub mod time;
 
 pub static NATIVE_LIBRARY: Lazy<HashMap<&'static str, NativeFunction>> = Lazy::new(|| {
     let mut map = HashMap::new();
@@ -29,5 +30,8 @@ pub static NATIVE_LIBRARY: Lazy<HashMap<&'static str, NativeFunction>> = Lazy::n
     map.insert("file$read", file::FILE_READ);
     map.insert("file$write", file::FILE_WRITE);
 
+    // time
+    map.insert("wait", time::WAIT);
+
     map
 });
diff --git a/crates/sloth_vm/src/sloth_std/time.rs b/crates/sloth_vm/src/sloth_std/time.rs
new file mode 100644
index 0000000..4df715e
--- /dev/null
+++ b/crates/sloth_vm/src/sloth_std/time.rs
@@ -0,0 +1,25 @@
+use std::{thread, time};
+
+use crate::native::{self, NativeFunction, NativeFunctionResult};
+use crate::value::Primitive;
+use crate::value::Primitive::Integer;
+use crate::VM;
+
+fn wait(_vm: &mut VM, args: &[Primitive]) -> NativeFunctionResult {
+    let sec = args.get(0).cloned();
+
+    let Some(Integer(sec)) = sec else {
+        return Err(native::Error::InvalidArgument);
+    };
+
+    thread::sleep(time::Duration::from_secs(sec.try_into().unwrap()));
+
+    Ok(Primitive::Empty)
+}
+
+pub const WAIT: NativeFunction = NativeFunction {
+    name: "wait",
+    function: wait,
+    arity: 1,
+    returns_value: false,
+};