diff --git a/Homeworks/behavioral_design_patterns/area.rb b/Homeworks/behavioral_design_patterns/area.rb
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+++ b/Homeworks/behavioral_design_patterns/area.rb
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+# Template method Design Pattern
+# https://cacoo.com/diagrams/fnlz5bSWSRPtuoAF
+
+class Area
+	def initialize *args ; end
+
+	def calculate ; end
+
+	def area
+		calculate()
+	end
+end
+
+class RectangularArea < Area
+	def initalize(longitude, width)
+		@longitude = longitude
+		@width = width
+	end
+
+	def calculate
+		(@longitude + @width) * 2
+	end
+end
+
+def SquareArea < Area
+	def initialize(edge)
+		@edge = edge
+	end
+
+	def calculate
+		(@edge * 4)
+	end
+end
+
+def CircleArea < Area
+	def initialize(radius)
+		@radius = radius
+	end
+
+	def calculate
+		(@radius * @radius * 2)
+	end
+end
diff --git a/Homeworks/behavioral_design_patterns/stratetry_pattern.PNG b/Homeworks/behavioral_design_patterns/stratetry_pattern.PNG
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diff --git a/Homeworks/behavioral_design_patterns/template_method_pattern.PNG b/Homeworks/behavioral_design_patterns/template_method_pattern.PNG
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diff --git a/Homeworks/behavioral_design_patterns/transport_algorithm.rb b/Homeworks/behavioral_design_patterns/transport_algorithm.rb
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+++ b/Homeworks/behavioral_design_patterns/transport_algorithm.rb
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+# Strategy design pattern
+# https://cacoo.com/diagrams/SYmlKFaYO7TY5ZiV
+class TransportAlgorithm
+	def tranfer ;end
+end
+
+def TransportationToAirportByTaxi
+	def initialize(TransportAlgorithm transport_algorithm)
+	 	@transport_algorithm = transport_algorithm
+	end
+
+	def tranfer()
+		@transport_algorithm.tranfer()
+	end
+end
+
+def TransportToAirportByBus < TransportAlgorithm
+	def tranfer
+		# something code
+	end
+end
+
+class TransportationToAirport < TransportAlgorithm
+	def tranfer
+		# something code
+	end
+end
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diff --git a/Homeworks/creational_design_patterns/prototype_patterns.png b/Homeworks/creational_design_patterns/prototype_patterns.png
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diff --git a/Homeworks/creational_design_patterns/school_prototypes.rb b/Homeworks/creational_design_patterns/school_prototypes.rb
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+++ b/Homeworks/creational_design_patterns/school_prototypes.rb
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+#Design Patterns: Prototype 
+
+class SchoolPrototypes
+	def initialize *args; end
+
+	def clone
+		#code something	
+	end
+end
+
+
+class TeamPrototypes < SchoolPrototypes
+	def clone
+		#code something
+	end
+end
+
+class GradePrototypes < SchoolPrototypes
+	def clone
+		#code something
+	end
+end
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diff --git a/Homeworks/structural_design_patterns/Pay .png b/Homeworks/structural_design_patterns/Pay .png
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diff --git a/Homeworks/structural_design_patterns/pay.rb b/Homeworks/structural_design_patterns/pay.rb
new file mode 100644
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+++ b/Homeworks/structural_design_patterns/pay.rb
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+# Old code
+module PayAPI
+  def pay()
+    # your code here
+  end
+end
+
+class PayWithVietcomBank
+  include PayAPI
+  def start_pay()
+    # your code here
+    PayAPI.pay()
+  end
+end
+
+class PayWithVietinBank
+  include PayAPI
+  def start_pay()
+    # your code here
+    PayAPI.pay()
+  end
+end
+
+# Problem: If change name of pay method in PayAPI, you need change this name in all class use it
+# Soluntion: Use adapter pattern
+# Code refactored
+
+module PayAPI
+  def pay()
+    # your code here
+  end
+end
+
+module CustomPayAPI
+  include PayAPI
+  def custom_pay()
+    PayAPI.pay()
+  end
+end
+
+class PayWithVietcomBank
+  include CustomPayAPI
+  def start_pay()
+    # your code here
+    CustomPayAPI.custom_pay()
+  end
+end
+
+class PayWithVietinBank
+  include CustomPayAPI
+  def start_pay()
+    # your code here
+    CustomPayAPI.custom_pay()
+  end
+end
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