diff --git a/clock.py b/clock.py
new file mode 100644
index 0000000..a0d942b
--- /dev/null
+++ b/clock.py
@@ -0,0 +1,17 @@
+from tkinter import *
+from tkinter.ttk import *
+ 
+from time import strftime
+ 
+root = Tk()
+root.title("Clock")
+ 
+def time():
+    string = strftime('%H:%M:%S %p')
+    label.config(text=string)
+    label.after(1000, time)
+ 
+label = Label(root, font=("ds-digital", 50), background = "black", foreground = "red")
+label.pack(anchor='center')
+time()
+mainloop()
\ No newline at end of file
diff --git a/code.c.txt b/code.c.txt
new file mode 100644
index 0000000..538e998
--- /dev/null
+++ b/code.c.txt
@@ -0,0 +1,119 @@
+import os
+def Return():
+    C="Y"
+    while(C=="Y"):
+        PI=0        
+        F=open("Return.txt","r")
+        X=F.readline()
+        while X:
+            PI=PI+1
+            X=F.readline()
+        F.close()
+        F=open("Return.txt","a+")
+        PD=str(input("\t\t\t enter Returned Date          :"))
+        VN=str(input("\t\t\t enter Student Name            :"))
+        VPno=str(input("\t\t\t enter Student Phno.           :"))
+        MI=str(input("\t\t\t enter Book Id              :"))
+        Q=int(input("\t\t\t enter Quantity               :"))
+        F.write(str(PI)+":"+PD+":"+VN+":"+VPno+":"+MI+":"+str(Q)+"\n")
+        F.close()
+        Z=open("Stock.txt","r")
+        k=Z.readline()
+        k=Z.readline()
+        N=[]
+        while k:
+            A=k.split(":")
+            N.append(A[0])
+            k=Z.readline()
+        Z.close()
+        Z=open("Stock.txt","r")
+        Y=open("Temp.txt","w")
+        m=Z.readline()
+        Y.write(m)
+        m=Z.readline()
+        while m:
+            B=m.split(":")
+            if(MI.strip()==B[0].strip()):
+                B[3]=str(int(B[3])+Q)
+                Y.write((":".join(B)+"\n"))
+            else:
+                Y.write((":".join(B)))
+            m=Z.readline()
+        C=input("\t\t\t You Want To Continue(Y/N)    :")
+        Y.close()
+        Z.close()
+        os.remove("Stock.txt")
+        os.rename("Temp.txt","Stock.txt")
+def ReturnModification():
+    F=open("Return.txt","r+")
+    B=open("ReturnTemp.txt","w+")
+    PI=str(input("\t\t\t Please enter Return id of \n\t\t\t Phone Record you want to modify"))
+    k=F.readline()
+    while k:
+        A=k.split(":")
+        if(A[0].strip()==PI):
+            PD=str(input("\t\t\t enter Returned Date          :"))
+            VN=str(input("\t\t\t enter Student Name            :"))
+            VPno=str(input("\t\t\t enter Student Phno.           :"))
+            MI=str(input("\t\t\t enter Book Id              :"))
+            Q=int(input("\t\t\t enter Quantity               :"))
+            K=open("Stock.txt","r")
+            S=open("Stocktemp.txt","w")
+            t=K.readline()
+            while(t):
+                c=t.split(":")
+                t=K.readline()
+                if(A[4]==c[0]):
+                    c[3]=str(int(c[3])-int(A[5]))+"\n"
+                    S.write((":".join(c)))
+                else:
+                    S.write((":".join(c)))
+            K.close()
+            S.close()
+            os.remove("Stock.txt")
+            os.rename("Stocktemp.txt","Stock.txt")
+            B.write(str(PI)+":"+PD+":"+VN+":"+VPno+":"+MI+":"+str(Q)+"\n")
+            K=open("Stock.txt","r")
+            S=open("Stocktemp.txt","w")
+            t=K.readline()
+            while(t):
+                c=t.split(":")
+                t=K.readline()
+                if(MI==c[0]):
+                    c[3]=str(int(c[3])+int(Q))+"\n"
+                    S.write((":".join(c)))
+                else:
+                    S.write((":".join(c)))
+            K.close()
+            S.close()
+            os.remove("Stock.txt")
+            os.rename("Stocktemp.txt","Stock.txt")
+        else:
+            B.write(k)
+        k=F.readline()
+    B.close()
+    F.close()
+    os.remove("Return.txt")
+    os.rename("ReturnTemp.txt","Return.txt")
+def Returndetail():
+    F=open("Return.txt","r")
+    print("*******************************************************")
+    k=F.readline()
+    A=k.split(":")
+    for i in range(0,len(A)):
+        print(A[i].strip(),end=" "*(15-len(A[i])))
+    print()
+    print("*******************************************************")
+    F.close()
+    F=open("Return.txt","r")
+    k=F.readline()
+    k=F.readline()
+    while k:
+        A=k.strip()
+        A=A.split(":")
+        for i in range(0,len(A)):
+            print(A[i],end=" "*(15-len(A[i])))
+        print()    
+        k=F.readline()
+    F.close()
+def Stockdetail():
\ No newline at end of file
diff --git a/marks.c b/marks.c
new file mode 100644
index 0000000..8d45a4f
--- /dev/null
+++ b/marks.c
@@ -0,0 +1,14 @@
+#include <stdio.h>
+int main()
+{
+	int roll;
+	float phy,chem,maths,eng,avg=0.0;
+	printf("what is your roll number and marks");
+	scanf("%d",&roll);
+	scanf("%f%f%f%f",&phy,&chem,&maths,&eng");
+	avg=(phy+chem+maths+eng)/4;
+	
+	printf("Your Roll \n%d",roll);
+	printf("Students average\n%f",avg);
+	return 0;
+}
\ No newline at end of file