diff --git a/samples/fortran.f90 b/samples/fortran.f90
new file mode 100644
index 0000000..6ae6a18
--- /dev/null
+++ b/samples/fortran.f90
@@ -0,0 +1,258 @@
+module prettify_selftest
+    implicit none
+   private
+     public :: dp, test_routine, &
+                 test_function,  test_type,    str_function
+   integer,   parameter :: dp = selected_real_kind ( 15 , 307)
+   type  test_type
+      real  (kind =dp ) :: r = 1.0d-3
+      integer :: i
+   end type test_type
+
+contains
+
+
+   subroutine test_routine( &
+   r, i, j, k, l)
+        integer, intent(in)                                :: r, i, j, k
+       integer,   intent (out)                               :: l
+
+    l  = test_function(r,i,j,k)
+ end &
+subroutine
+
+ pure function test_function(r, i, j, &
+                                        k) &
+   result(l)
+   integer, intent(in)                                :: r, i, j, k
+   integer                                            :: l
+
+      l=r + i +j  +k
+   end function
+   function &
+        str_function(a)      result(l)
+      character(len=*)                                   :: a
+      integer                                            :: l
+
+     if(len(a)<5)then
+       l=0
+      else
+       l=1
+       endif
+end function
+
+end module
+
+program example_prog
+ use example, only: dp, test_routine, test_function, test_type,str_function
+
+   implicit  none
+  integer :: r,i,j,k,l,my_integer,m
+     integer, dimension(5) :: arr
+   integer, dimension(20) :: big_arr
+integer :: endif
+   type(test_type) :: t
+real(kind=dp) :: r1,   r2,  r3, r4, r5,  r6
+  integer, pointer :: point
+
+  point=>  null( )
+
+! 1) white space formatting !
+!***************************!
+! example 1.1
+   r=1;i=-2;j=3;k=4;l=5
+   r2  =  0.0_dp; r3= 1.0_dp;   r4 =2.0_dp; r5=3.0_dp;  r6 = 4.0_dp
+   r1=-(r2**i*(r3+r5*(-r4)-r6))-2.e+2
+   if( r.eq.2.and.r<=5) i=3
+   write(*, *)(merge(3, 1, i<=2))
+   write(*, *)test_function(r,i,j , k)
+   t % r  = 4.0_dp
+   t%i  = str_function( "t  % i   =  " )
+
+! example 1.2
+   my_integer=2
+   i=3
+   j=5
+
+   big_arr = [1, 2, 3, 4, 5, &
+              6, 7, 8, 9, 10, &
+              11, 12, 13, 14, 15, &
+              16, 17, 18, 19, 20]
+
+! example 1.3: disabling auto-formatter:
+   my_integer = 2 !&
+   i          = 3 !&
+   j          = 5 !&
+
+!&<
+   my_integer = 2
+   i          = 3
+   j          = 5
+!&>
+
+   big_arr = [ 1,  2,  3,  4,  5, & !&
+               6,  7,  8,  9, 10, & !&
+              11, 12, 13, 14, 15, & !&
+              16, 17, 18, 19, 20] !&
+
+! example 1.4:
+
+   big_arr = [1, 2, 3, 4, 5,&
+           &  6, 7, 8, 9, 10, &
+           & 11, 12, 13, 14, 15,&
+            &16, 17, 18, 19, 20]
+
+! 2) auto indentation for loops !
+!*******************************!
+
+! example 2.1
+   l = 0
+   do r=   1 , 10
+    select case (r)
+      case(1)
+    do_label: do i  =  1,100
+        if  (i<=2)   then
+          m =0
+      do while(m <4)
+              m =m+1
+             do k=1,3
+      if (k==1)  l =l +1
+    end do
+      enddo
+     endif
+    enddo do_label
+    case ( 2 )
+      l=i + j + k
+      end select
+   enddo
+
+! example 2.2
+   do m = 1, 2
+     do r = 1, 3
+        write (*, *) r
+         do k = 1, 4
+         do l = 1, 3
+         do i = 4, 5
+          do my_integer = 1, 1
+          do j = 1, 2
+          write (*, *) test_function(m, r, k, l) + i
+            enddo
+            enddo
+         enddo
+        enddo
+          enddo
+      enddo
+   enddo
+
+! 3) auto alignment for linebreaks   !
+!************************************!
+
+! example 3.1
+   l = test_function(1, 2, test_function(1, 2, 3, 4), 4) + 3 *(2+1)
+
+   l = test_function (1, 2, test_function(1,2, 3, 4),4)  +&
+              3*(2+ 1 )
+
+   l =  test_function(1, 2,   &
+               test_function(1, 2,  3, 4),  4)+ &
+                                    3 * (2+1)
+
+   l = test_function(1, 2, &
+   test_function(1, 2, 3, &
+   4), 4) + &
+   3*(2 + 1)
+
+! example 3.2
+   arr = [1, (/3,4, 5/),   6] + [  1, 2,3, 4,5 ]
+
+   arr = [1,(/ 3, 4, 5 /) , &
+   6]  +[1,2, 3, 4, 5 ]
+
+   arr = [1,(/3,4,5/),  &
+   6]+ &
+             [1, 2, 3, 4, 5]
+
+   arr = [1, (/3, 4, &
+         5/), &
+         6] + &
+         [1, 2,3, 4, 5 ]
+
+! example 3.3
+   l = test_function(1, 2, &
+         3, 4)
+
+   l = test_function( &
+                  1, 2, 3, 4)
+
+   arr = [1, 2, &
+        3, 4, 5]
+   arr = [ &
+            1, 2, 3, 4, 5]
+
+! 4) more complex formatting and tricky test cases !
+!**************************************************!
+
+! example 4.1
+   l = 0
+   do r = 1, 10
+         select case ( r )
+   case( 1)
+           do i=1,100;if (i<=2) then! comment
+          do j = 1,5
+                    do   k= 1, 3
+                 l = l +  1
+! unindented comment
+         ! indented comment
+              end do; enddo
+                elseif ( .not. j ==4 ) then
+                  my_integer  =   4
+               else
+            write (*,*)   " hello"
+             endif
+           enddo
+            case(2 )
+           l = i+ j + k
+              end select
+               enddo
+
+! example 4.2
+   if ( &
+    l == &
+       111) &
+         then
+       do k = 1, 2
+   if (k == 1) &
+               l = test_function(1, &
+                          test_function(r=4, i=5, &
+                      j=6, k=test_function(1,2*(3*(1 +1)), str_function ( ")a!(b['(;=dfe"), &
+                                                                 9) + &
+                            test_function(1, 2, 3, 4)), 9, 10) &
+                     ! test_function(1,2,3,4)),9,10) &
+            ! +13*str_function('') + str_function('"')
+                    + 13*str_function('') + str_function('"')
+                    end & ! comment
+          ! comment
+      do
+       endif
+
+! example 4.3
+   arr = [1,( /3,4, &
+      5 /),&
+          6 ]+ &
+    [1,2, 3, 4,5] ; arr = [1, 2,&
+       3, 4, 5]
+
+! example 4.4
+   endif = 3
+   if(endif==2)then
+   endif=5
+   else if(endif==3)then
+   write(*,*)endif
+   endif
+
+! example 4.5
+   do i=1,2;if(.true.)then
+   write(*, *)"hello"
+   endif; enddo
+
+   end program