not correct, but doing something.

grid.gd

@@ -6,6 +6,7 @@ extends Node2D
 @export var offset: float = 55.0
 
 var grid: Array[Array]
+var groups: Array
 
 var token = preload("res://token.tscn")
 
@@ -23,21 +24,44 @@ func _ready():
 func populate_grid():
 	pass
 	
+func to_grid_coord(idx):
+	pass
+	
+func to_index(idx):
+	pass
+	
 func calculate_token_groups():
+	groups = []
+	var visited_nodes = []
+	var group_queue = []
 	for row in rows:
 		for col in cols:
-			var current_token = grid[row][col]
-			var adjacent_token_coords = [
-				[row - 1, col],
-				[row, col + 1],
-				[row + 1, col],
-				[row, col - 1]
-			]
+			if [row, col] in visited_nodes:
+				continue
 				
-			var valid_coords = adjacent_token_coords.filter(
-				func(coord_pair): return coord_pair[0] >= 0 and coord_pair[0] < rows and coord_pair[1] >= 0 and coord_pair[1] < cols
-			)
+			group_queue.append([row,col])
 			
-			for coord in valid_coords:
-				if grid[coord[0]][coord[1]].type == current_token.type:
-					print(coord)
+			var new_group = []
+			while not group_queue.is_empty():
+				var current_coord = group_queue.pop_back()
+				var current_token = grid[current_coord[0]][current_coord[1]]
+				new_group.append(current_coord)
+				visited_nodes.append(current_coord)
+			
+				var adjacent_token_coords = [
+					[row - 1, col],
+					[row, col + 1],
+					[row + 1, col],
+					[row, col - 1]
+				]
+			
+				var valid_coords = adjacent_token_coords.filter(
+					func(coord_pair): return coord_pair[0] >= 0 and coord_pair[0] < rows and coord_pair[1] >= 0 and coord_pair[1] < cols
+				)
+			
+				for coord in valid_coords:
+					if coord not in visited_nodes and grid[coord[0]][coord[1]].type == current_token.type:
+						group_queue.append(coord)
+			groups.append(new_group)
+			
+	print(groups)