the code is not working yet

mbta.rb

@@ -1,5 +1,71 @@
 
 # your solution here
-def stops_between_stations
 
-end
+def one_line_stops(line, start_stop, end_stop) 
+
+lines = {
+"red line" => ["South Station", "Park Street", "Kendall", "Central", "Harvard", "Porter", "Davis", "Alewife"],
+"green line" => ["Government Center", "Park Street", "Boylston", "Arlington", "Copley", "Hynes", "Kenmore"],
+"orange line" => ["North Station", "Haymarket", "Park Street", "State", "Downtown Crossing", "Chinatown", "Back Bay", "Forest Hills"]
+}
+
+stops_counter = 0
+
+  lineArray = lines[line]
+station_name = ""
+
+   start_stop_index = lineArray.index start_stop
+   end_stop_index = lineArray.index end_stop
+
+    if (start_stop_index < end_stop_index)  
+      i = start_stop_index + 1 
+       while i <= end_stop_index do
+      station_name += lineArray[i] 
+      stops_counter += 1
+      i +=1
+
+       end  
+       return stops_counter}
+    else
+          i = start_stop_index - 1
+       while i >= end_stop_index do
+      station_name += lineArray[i] 
+      stops_counter += 1
+      i -=1
+
+       end
+       return  stops_counter
+    # return station_name
+   end
+
+
+
+end
+
+def stops_between_stations(start_line,start_stop,end_line, end_stop)
+    lines = {
+"red line" => ["South Station", "Park Street", "Kendall", "Central", "Harvard", "Porter", "Davis", "Alewife"],
+"green line" => ["Government Center", "Park Street", "Boylston", "Arlington", "Copley", "Hynes", "Kenmore"],
+"orange line" => ["North Station", "Haymarket", "Park Street", "State", "Downtown Crossing", "Chinatown", "Back Bay", "Forest Hills"]
+}
+  lineArray = lines[line]
+station_name = ""
+
+   start_stop_index = lineArray.index start_stop
+   end_stop_index = lineArray.index end_stop
+stops_counter = 0
+station_name = ""
+
+    if start_line == end_line
+        trip = one_line_stops(start_line, start_stop,end_stop)
+           puts "your total stops are #{ trip } stops"
+        else
+           first_trip =  one_line_stops(start_line, start_stop, "Park Street") 
+           second_trip = one_line_stops(end_line, "Park Street", end_stop)
+           total_stops = first_trip + second_trip
+           puts "your total stops are #{ total_stops } stops"
+
+        end 
+    end
+
+