class CascadingBody:
    def __init__(self):
        self.actions = {}           # Action registry
        self.things = {}            # Object/state registry  
        self.relationships = {}     # Thing-Action mappings
        self.execution_stack = []   # Cascade tracking
        self.meta_actions = {}      # Actions that create actions
        
        # Bootstrap with fundamental actions
        self._bootstrap_core_actions()
    
    def _bootstrap_core_actions(self):
        # Core actions that enable self-modification
        self.define_action('define_action', self._define_action)
        self.define_action('relate', self._relate_thing_action)
        self.define_action('cascade', self._execute_cascade)
        self.define_action('compose', self._compose_actions)
        
    def define_action(self, name, function):
        """Define or redefine an action"""
        self.actions[name] = function
        return f"Action '{name}' defined"
    
    def _define_action(self, action_name, *params):
        """Meta-action: Define new actions at runtime"""
        if len(params) >= 1:
            # Define from existing actions
            source_action = params[0]
            if source_action in self.actions:
                self.actions[action_name] = self.actions[source_action]
                return f"Action '{action_name}' created from '{source_action}'"
        
        # Define new programmable action
        def new_action(*args):
            # This can be extended to interpret code
            result = f"Executing programmable action: {action_name}"
            # Could compile and execute new code here
            return result
            
        self.actions[action_name] = new_action
        return f"Programmable action '{action_name}' defined"
    
    def _relate_thing_action(self, thing, action):
        """Create thing-action relationships"""
        if thing not in self.relationships:
            self.relationships[thing] = []
        self.relationships[thing].append(action)
        return f"Thing '{thing}' now relates to action '{action}'"
    
    def execute_on_thing(self, thing, *args):
        """Execute all actions related to a thing, creating cascades"""
        if thing not in self.relationships:
            return f"No actions defined for thing '{thing}'"
        
        results = []
        for action_name in self.relationships[thing]:
            if action_name in self.actions:
                self.execution_stack.append(f"{thing}->{action_name}")
                result = self.actions[action_name](*args)
                results.append(result)
                
                # Check if result should cascade
                if isinstance(result, str) and result in self.relationships:
                    cascade_result = self.execute_on_thing(result)
                    results.append(f"CASCADE: {cascade_result}")
                
                self.execution_stack.pop()
        
        return results

    def _execute_cascade(self, trigger, depth=3):
        """Explicit cascade execution"""
        if depth <= 0:
            return "Max cascade depth reached"
        
        results = []
        current = trigger
        for i in range(depth):
            if current in self.relationships:
                action_results = self.execute_on_thing(current)
                results.append(f"Level {i}: {action_results}")
                # Use last result as next trigger
                if action_results and isinstance(action_results[-1], str):
                    current = action_results[-1]
            else:
                break
        return results

    def _compose_actions(self, new_action_name, *action_sequence):
        """Compose multiple actions into one new action"""
        def composed(*args):
            results = []
            for action_name in action_sequence:
                if action_name in self.actions:
                    result = self.actions[action_name](*args)
                    results.append(result)
            return results
                
        self.actions[new_action_name] = composed
        return f"Composed action '{new_action_name}' from {action_sequence}"