diff --git a/src/command/mod.js b/src/command/mod.js
new file mode 100644
index 0000000..ecbf657
--- /dev/null
+++ b/src/command/mod.js
@@ -0,0 +1,48 @@
+Juicescript.command_define({
+	name: "mod",
+	alias: [],
+	
+	validate: function(runner){
+		// count
+		runner.argument_validate_count({min: 2, max: null});
+		if(runner.has_error) return;
+		
+		// types
+		runner.argument_validate_type(1, Juicescript.argument_type.VARIABLE);
+		
+		for(var q = 2; q <= runner.command.argument.length; q++){
+			runner.argument_validate_type(q, Juicescript.argument_type.VALUE);
+		}
+	},
+	
+	execute: function(runner){
+		// GET VARIABLE //
+		// variable object
+		let variable = runner.argument_variable(1);
+		
+		// get its value
+		let value = runner.variable_get(variable);
+		
+		
+		// APPLY MODULO FROM OTHER ARGUMENTS //
+		for(var q = 2; q <= runner.command.argument.length; q++){
+			// get value to use with modulo operation
+			let modulo = runner.argument_value(q);
+			
+			// validate data type
+			let data_type = runner.data_type(modulo);
+			if(data_type !== Juicescript.data_type.NUM){
+				// ignore with warning
+				runner.warning_argument(q, "expected data type NUM, but got " + Juicescript.data_type.name(data_type));
+				continue;
+			}
+			
+			// do calculation
+			value %= modulo;
+		}
+		
+		
+		// STORE BACK TO VARIABLE //
+		runner.variable_set(variable, value);
+	}
+});