## Here is an example for Fortran 90/95

syntax "fortran" "\.(f|f90|f95)$" 

#color red "[[:<:]][A-Z_]a[0-9A-Z_]+[[:>:]]" 
color red "[[:<:]][0-9]+[[:>:]]" 

icolor green "[[:<:]](action|advance|all|allocatable|allocated|any|apostrophe)[[:>:]]"
icolor green "[[:<:]](append|asis|assign|assignment|associated|character|common)[[:>:]]"
icolor green "[[:<:]](complex|data|default|delim|dimension|double precision)[[:>:]]"
icolor green "[[:<:]](elemental|epsilon|external|file|fmt|form|format|huge)[[:>:]]"
icolor green "[[:<:]](implicit|include|index|inquire|integer|intent|interface)[[:>:]]"
icolor green "[[:<:]](intrinsic|iostat|kind|logical|module|none|null|only)>"
icolor green "[[:<:]](operator|optional|pack|parameter|pointer|position|private)[[:>:]]"
icolor green "[[:<:]](program|public|real|recl|recursive|selected_int_kind)[[:>:]]"
icolor green "[[:<:]](selected_real_kind|subroutine|status)[[:>:]]"

icolor cyan "[[:<:]](abs|achar|adjustl|adjustr|allocate|bit_size|call|char)[[:>:]]" 
icolor cyan "[[:<:]](close|contains|count|cpu_time|cshift|date_and_time)[[:>:]]" 
icolor cyan "[[:<:]](deallocate|digits|dot_product|eor|eoshift|function|iachar)[[:>:]]" 
icolor cyan "[[:<:]](iand|ibclr|ibits|ibset|ichar|ieor|iolength|ior|ishft|ishftc)[[:>:]]" 
icolor cyan "[[:<:]](lbound|len|len_trim|matmul|maxexponent|maxloc|maxval|merge)[[:>:]]" 
icolor cyan "[[:<:]](minexponent|minloc|minval|mvbits|namelist|nearest|nullify)[[:>:]]" 
icolor cyan "[[:<:]](open|pad|present|print|product|pure|quote|radix)[[:>:]]" 
icolor cyan "[[:<:]](random_number|random_seed|range|read|readwrite|replace)[[:>:]]" 
icolor cyan "[[:<:]](reshape|rewind|save|scan|sequence|shape|sign|size|spacing)[[:>:]]" 
icolor cyan "[[:<:]](spread|sum|system_clock|target|transfer|transpose|trim)[[:>:]]" 
icolor cyan "[[:<:]](ubound|unpack|verify|write|tiny|type|use|yes)[[:>:]]"

icolor yellow "[[:<:]](.and.|case|do|else|else?if|else?where|end|end?do|end?if)[[:>:]]"
icolor yellow "[[:<:]](end?select|.eqv.|forall|if|lge|lgt|lle|llt|.neqv.|.not.)[[:>:]]"
icolor yellow "[[:<:]](.or.|repeat|select case|then|where|while)[[:>:]]"

icolor magenta "[[:<:]](continue|cycle|exit|go?to|result|return)[[:>:]]"

## String highlighting.  
icolor yellow "<[^= 	]*>" ""(\\.|[^"])*""

## Comment highlighting
icolor blue "!.*"

