diff --git a/reaction_systems_gui/src/app.rs b/reaction_systems_gui/src/app.rs
index 05c3784..5a7a1a7 100644
--- a/reaction_systems_gui/src/app.rs
+++ b/reaction_systems_gui/src/app.rs
@@ -256,6 +256,7 @@ pub enum NodeInstruction {
     Path,
     ReadPath,
     SaveString,
+    Sleep,
 
     // create basic data types
     Symbol,
@@ -483,6 +484,7 @@ impl NodeInstruction {
                 ("display node", DisplayNode),
                 ("display edge", DisplayEdge),
             ],
+            | Self::Sleep => vec![("seconds", PositiveInt)],
         }
         .into_iter()
         .map(|e| (e.0.to_string(), e.1))
@@ -577,6 +579,7 @@ impl NodeInstruction {
             | Self::PositiveBisimilarityPaigeTarjanNoLabels =>
                 vec![("out", String)],
             | Self::PositiveBisimilarityPaigeTarjan => vec![("out", String)],
+            | Self::Sleep => vec![("out", PositiveInt)],
         };
         res.into_iter()
             .map(|res| (res.0.to_string(), res.1))
@@ -1061,6 +1064,7 @@ impl NodeTemplateTrait for NodeInstruction {
                 "Positive Paige & Torjan (ignore labels)",
             | Self::PositiveBisimilarityPaigeTarjan =>
                 "Positive Paige & Torjan",
+            | Self::Sleep => "Sleep",
         })
     }
 
@@ -1142,6 +1146,7 @@ impl NodeTemplateTrait for NodeInstruction {
             | Self::PositiveBisimilarityPaigeTarjanNoLabels
             | Self::PositiveBisimilarityPaigeTarjan =>
                 vec!["Positive Graph", "Positive Bisimilarity"],
+            | Self::Sleep => vec!["General"],
         }
     }
 
@@ -1246,6 +1251,7 @@ impl NodeTemplateIter for AllInstructions {
             NodeInstruction::PositiveBisimilarityKanellakisSmolka,
             NodeInstruction::PositiveBisimilarityPaigeTarjanNoLabels,
             NodeInstruction::PositiveBisimilarityPaigeTarjan,
+            NodeInstruction::Sleep,
         ]
     }
 }
diff --git a/reaction_systems_gui/src/app_logic.rs b/reaction_systems_gui/src/app_logic.rs
index 2e0aa8a..01f3eb1 100644
--- a/reaction_systems_gui/src/app_logic.rs
+++ b/reaction_systems_gui/src/app_logic.rs
@@ -109,11 +109,12 @@ fn generate_to_evaluate(
             continue;
         }
 
-        let first_output = if let Some(o) = graph[n_id].output_ids().next() {
-            o
-        } else {
-            continue;
-        };
+        let first_output =
+            if let Some(o) = graph[n_id].output_ids().next() {
+                o
+            } else {
+                continue;
+            };
         let hashes =
             if let Some(hashes) = outputs_cache.input_hashes(&first_output) {
                 hashes
@@ -2469,6 +2470,22 @@ fn process_template(
                 },
             }
         },
+        | NodeInstruction::Sleep => {
+            let input_seconds = retrieve_from_cache![1];
+            let hash_inputs = hash_inputs!(input_seconds);
+
+            if let BasicValue::PositiveInt { value } = input_seconds {
+                std::thread::sleep(std::time::Duration::from_secs(value as u64));
+
+                set_cache_output!((
+                    output_names.first().unwrap(),
+                    input_seconds,
+                    hash_inputs
+                ));
+            } else {
+                anyhow::bail!("Not an integer");
+            }
+        }
     }
     Ok(None)
 }