diff --git a/LibMatrix/matrix.c b/LibMatrix/matrix.c
index 356c059..e818705 100644
--- a/LibMatrix/matrix.c
+++ b/LibMatrix/matrix.c
@@ -665,3 +665,26 @@ bool equalsMatrix(Matrix m1, Matrix m2){
 
 	return true;
 }
+
+void setRowToTrue(Matrix matrix, int RowNb){
+	int i =0;
+	for (i=0;i<m2.colCount;i++){
+		setCellValue(matrix,i,RowNb);	
+	}
+	
+}
+
+void setColToTrue(Matrix matrix, int ColNb){
+	int i =0;
+	for (i=0;i<m2.rowCount;i++){
+		setCellValue(matrix,ColNb,i);	
+	}
+	
+}
+
+void createSquare(Matrix matrix){
+	setRowToTrue(matrix,rowCount/4);
+	setRowToTrue(matrix,rowCount*3/4);
+	setColToTrue(matrix,colCount/4);
+	setColToTrue(matrix,colCount*3/4);
+}
\ No newline at end of file
diff --git a/LibMatrix/matrix.h b/LibMatrix/matrix.h
index 3545ea9..dc22201 100644
--- a/LibMatrix/matrix.h
+++ b/LibMatrix/matrix.h
@@ -490,5 +490,31 @@ bool isColumnEmpty(Matrix matrix,int nb);
 */
 bool isRowEmpty(Matrix matrix,int nb);
 
+
+/**
+* Sets a Row to true
+*
+* @param matrix a Matrix
+* @param RowNb int number of the row
+*/
+void setRowToTrue(Matrix matrix, int RowNb);
+
+
+/**
+* Sets a Col to true
+*
+* @param matrix a Matrix
+* @param ColNb int nuber of the col
+*/
+void setColToTrue(Matrix matrix, int ColNb);
+
+/**
+* Sets some values to true to create a square in the matrix
+*
+* @param matrix a Matrix
+*/
+void createSquare(Matrix matrix);
+
+
 #endif