docs: images in readme

README.md

@@ -445,6 +445,9 @@ ax.set_title('KDE Plot with Boundary Condition: y ≤ x')
 plt.show()
 ```
 
+![image](https://github.com/user-attachments/assets/4c67d06f-0907-4a9e-9b95-2f12870a205e)
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 ## Plot Without Boundary Condition
 
 
@@ -467,6 +470,10 @@ ax.set_title('KDE Plot without Boundary Condition')
 plt.show()
 ```
 
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+![image](https://github.com/user-attachments/assets/8ea779cf-7dc0-4aae-a3e1-194abf2046bd)
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 ### Output
 
 When you run the code above, you will get two plots:
@@ -501,6 +508,9 @@ plt.show()
 ```
 
 
+![image](https://github.com/user-attachments/assets/32d06bc2-cd9f-4680-88ec-5dd3d9a79abd)
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 ## Circular Boundary Condition
 
 
@@ -526,4 +536,8 @@ ax.set_title('KDE Plot with Circular Boundary Condition')
 # Show the plot
 plt.show()
 ```
-a
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+![image](https://github.com/user-attachments/assets/e28fe762-98fe-4401-8c69-0863d176da78)
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